
/*** Start of inlined file: serialport.c ***/

/*** Start of inlined file: libserialport_internal.h ***/
#ifndef LIBSERIALPORT_LIBSERIALPORT_INTERNAL_H
#define LIBSERIALPORT_LIBSERIALPORT_INTERNAL_H

/* These MSVC-specific defines must appear before other headers.*/
#ifdef _MSC_VER
#define _CRT_NONSTDC_NO_DEPRECATE
#define _CRT_SECURE_NO_WARNINGS
#endif

/* These feature test macros must appear before other headers.*/
#if defined(__linux__) || defined(__CYGWIN__)
/* For timeradd, timersub, timercmp, realpath. */
#define _BSD_SOURCE 1 /* for glibc < 2.19 */
#define _DEFAULT_SOURCE 1 /* for glibc >= 2.20 */
/* For clock_gettime and associated types. */
#define _POSIX_C_SOURCE 199309L
#endif

#ifdef LIBSERIALPORT_ATBUILD
/* If building with autoconf, include the generated config.h. */

/*** Start of inlined file: config.h ***/
/* config.h.in.  Generated from configure.ac by autoheader.  */

/* clock_gettime is available. */
#define HAVE_CLOCK_GETTIME 1

/* Define to 1 if you have the declaration of `BOTHER', and to 0 if you don't.
   */
#define HAVE_DECL_BOTHER 1

/* Define to 1 if you have the <dlfcn.h> header file. */
#define HAVE_DLFCN_H 1

/* flock is available. */
#define HAVE_FLOCK 1

/* Define to 1 if you have the <inttypes.h> header file. */
#define HAVE_INTTYPES_H 1

/* Define to 1 if you have the <memory.h> header file. */
#define HAVE_MEMORY_H 1

/* realpath is available. */
#define HAVE_REALPATH 1

/* Define to 1 if you have the <stdint.h> header file. */
#define HAVE_STDINT_H 1

/* Define to 1 if you have the <stdlib.h> header file. */
#define HAVE_STDLIB_H 1

/* Define to 1 if you have the <strings.h> header file. */
#define HAVE_STRINGS_H 1

/* Define to 1 if you have the <string.h> header file. */
#define HAVE_STRING_H 1

/* Define to 1 if the system has the type `struct serial_struct'. */
#define HAVE_STRUCT_SERIAL_STRUCT 1

/* Define to 1 if the system has the type `struct termios2'. */
#define HAVE_STRUCT_TERMIOS2 1

/* Define to 1 if `c_ispeed' is a member of `struct termios2'. */
#define HAVE_STRUCT_TERMIOS2_C_ISPEED 1

/* Define to 1 if `c_ospeed' is a member of `struct termios2'. */
#define HAVE_STRUCT_TERMIOS2_C_OSPEED 1

/* Define to 1 if `c_ispeed' is a member of `struct termios'. */
/* #undef HAVE_STRUCT_TERMIOS_C_ISPEED */

/* Define to 1 if `c_ospeed' is a member of `struct termios'. */
/* #undef HAVE_STRUCT_TERMIOS_C_OSPEED */

/* sys/file.h is available. */
#define HAVE_SYS_FILE_H 1

/* Define to 1 if you have the <sys/stat.h> header file. */
#define HAVE_SYS_STAT_H 1

/* Define to 1 if you have the <sys/types.h> header file. */
#define HAVE_SYS_TYPES_H 1

/* Define to 1 if you have the <unistd.h> header file. */
#define HAVE_UNISTD_H 1

/* Define to the sub-directory where libtool stores uninstalled libraries. */
#define LT_OBJDIR ".libs/"

/* Enumeration is unsupported. */
/* #undef NO_ENUMERATION */

/* Port metadata is unavailable. */
/* #undef NO_PORT_METADATA */

/* Define to the address where bug reports for this package should be sent. */
#define PACKAGE_BUGREPORT "martin-libserialport@earth.li"

/* Define to the full name of this package. */
#define PACKAGE_NAME "libserialport"

/* Define to the full name and version of this package. */
#define PACKAGE_STRING "libserialport 0.1.2"

/* Define to the one symbol short name of this package. */
#define PACKAGE_TARNAME "libserialport"

/* Define to the home page for this package. */
#define PACKAGE_URL "http://sigrok.org/wiki/Libserialport"

/* Define to the version of this package. */
#define PACKAGE_VERSION "0.1.2"

/* Macro preceding public API functions */
#define SP_API __attribute__((visibility("default")))

/* . */
#define SP_LIB_VERSION_AGE 1

/* . */
#define SP_LIB_VERSION_CURRENT 1

/* . */
#define SP_LIB_VERSION_REVISION 1

/* . */
#define SP_LIB_VERSION_STRING "1:1:1"

/* . */
#define SP_PACKAGE_VERSION_MAJOR 0

/* . */
#define SP_PACKAGE_VERSION_MICRO 2

/* . */
#define SP_PACKAGE_VERSION_MINOR 1

/* . */
#define SP_PACKAGE_VERSION_STRING "0.1.2"

/* Macro preceding private functions */
#define SP_PRIV __attribute__((visibility("hidden")))

/* Define to 1 if you have the ANSI C header files. */
#define STDC_HEADERS 1

/* Enable large inode numbers on Mac OS X 10.5.  */
#ifndef _DARWIN_USE_64_BIT_INODE
# define _DARWIN_USE_64_BIT_INODE 1
#endif

/* Number of bits in a file offset, on hosts where this is settable. */
/* #undef _FILE_OFFSET_BITS */

/* Define for large files, on AIX-style hosts. */
/* #undef _LARGE_FILES */

/* Define to `unsigned int' if <sys/types.h> does not define. */
/* #undef size_t */

#if HAVE_STRUCT_TERMIOS_C_ISPEED && HAVE_STRUCT_TERMIOS_C_OSPEED
# define HAVE_TERMIOS_SPEED 1
#endif
#if HAVE_STRUCT_TERMIOS2_C_ISPEED && HAVE_STRUCT_TERMIOS2_C_OSPEED
# define HAVE_TERMIOS2_SPEED 1
#endif

/*** End of inlined file: config.h ***/


#endif

#ifdef _MSC_VER
/* If building with MS tools, define necessary things that
   would otherwise appear in config.h. */
#define SP_PRIV
#else
#define SP_PRIV __attribute__((visibility("hidden")))
#endif

#include "libserialport.h"

#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <errno.h>
#include <stdio.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#ifdef _WIN32
#include <windows.h>
#include <tchar.h>
#include <setupapi.h>
#include <cfgmgr32.h>
#undef DEFINE_GUID
#define DEFINE_GUID(name,l,w1,w2,b1,b2,b3,b4,b5,b6,b7,b8) \
	static const GUID name = { l,w1,w2,{ b1,b2,b3,b4,b5,b6,b7,b8 } }
#include <usbioctl.h>
#include <usbiodef.h>
/* The largest size that can be passed to WriteFile() safely
 * on any architecture. This arises from the expression:
 * PAGE_SIZE * (65535 - sizeof(MDL)) / sizeof(ULONG_PTR)
 * and this worst-case value is found on x64. */
#define WRITEFILE_MAX_SIZE 33525760
#else
#include <limits.h>
#include <termios.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <time.h>
#include <poll.h>
#include <unistd.h>
#ifdef HAVE_SYS_FILE_H
#include <sys/file.h>
#endif
#endif
#ifdef __APPLE__
#include <CoreFoundation/CoreFoundation.h>
#include <IOKit/IOKitLib.h>
#include <IOKit/serial/IOSerialKeys.h>
#include <IOKit/serial/ioss.h>
#include <sys/syslimits.h>
#include <mach/mach_time.h>
#if MAC_OS_X_VERSION_MAX_ALLOWED < 120000 /* Before macOS 12 */
#define kIOMainPortDefault kIOMasterPortDefault
#endif
#endif
#ifdef __linux__
#include <dirent.h>
/* Android only has linux/serial.h from platform 21 onwards. */
#if !(defined(__ANDROID__) && (__ANDROID_API__ < 21))
#include <linux/serial.h>
#endif
#include "linux_termios.h"

/* TCGETX/TCSETX is not available everywhere. */
#if defined(TCGETX) && defined(TCSETX) && defined(HAVE_STRUCT_TERMIOX)
#define USE_TERMIOX
#endif
#endif

/* TIOCINQ/TIOCOUTQ is not available everywhere. */
#if !defined(TIOCINQ) && defined(FIONREAD)
#define TIOCINQ FIONREAD
#endif
#if !defined(TIOCOUTQ) && defined(FIONWRITE)
#define TIOCOUTQ FIONWRITE
#endif

/*
 * O_CLOEXEC is not available everywhere, fallback to not setting the
 * flag on those systems.
 */
#ifndef _WIN32
#ifndef O_CLOEXEC
#define O_CLOEXEC 0
#endif
#endif

/* Non-standard baudrates are not available everywhere. */
#if (defined(HAVE_TERMIOS_SPEED) || defined(HAVE_TERMIOS2_SPEED)) && HAVE_DECL_BOTHER
#define USE_TERMIOS_SPEED
#endif

struct sp_port {
	char *name;
	char *description;
	enum sp_transport transport;
	int usb_bus;
	int usb_address;
	int usb_vid;
	int usb_pid;
	char *usb_manufacturer;
	char *usb_product;
	char *usb_serial;
	char *bluetooth_address;
#ifdef _WIN32
	char *usb_path;
	HANDLE hdl;
	COMMTIMEOUTS timeouts;
	OVERLAPPED write_ovl;
	OVERLAPPED read_ovl;
	OVERLAPPED wait_ovl;
	DWORD events;
	BYTE *write_buf;
	DWORD write_buf_size;
	BOOL writing;
	BOOL wait_running;
	BOOL last_wait_thread_exited;
#else
	int fd;
#endif
};

struct sp_port_config {
	int baudrate;
	int bits;
	enum sp_parity parity;
	int stopbits;
	enum sp_rts rts;
	enum sp_cts cts;
	enum sp_dtr dtr;
	enum sp_dsr dsr;
	enum sp_xonxoff xon_xoff;
};

struct port_data {
#ifdef _WIN32
	DCB dcb;
#else
	struct termios term;
	int controlbits;
	int termiox_supported;
	int rts_flow;
	int cts_flow;
	int dtr_flow;
	int dsr_flow;
#endif
};

#ifdef _WIN32
typedef HANDLE event_handle;
#else
typedef int event_handle;
#endif

/* Standard baud rates. */
#ifdef _WIN32
#define BAUD_TYPE DWORD
#define BAUD(n) {CBR_##n, n}
#else
#define BAUD_TYPE speed_t
#define BAUD(n) {B##n, n}
#endif

struct std_baudrate {
	BAUD_TYPE index;
	int value;
};

#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))

extern void (*sp_debug_handler)(const char *format, ...);

/* Debug output macros. */
#define DEBUG_FMT(fmt, ...) do { \
	if (sp_debug_handler) \
		sp_debug_handler(fmt ".\n", __VA_ARGS__); \
} while (0)
#define DEBUG(msg) DEBUG_FMT(msg, NULL)
#define DEBUG_ERROR(err, msg) DEBUG_FMT("%s returning " #err ": " msg, __func__)
#define DEBUG_FAIL(msg) do {               \
	char *errmsg = sp_last_error_message(); \
	DEBUG_FMT("%s returning SP_ERR_FAIL: " msg ": %s", __func__, errmsg); \
	sp_free_error_message(errmsg); \
} while (0);
#define RETURN() do { \
	DEBUG_FMT("%s returning", __func__); \
	return; \
} while (0)
#define RETURN_CODE(x) do { \
	DEBUG_FMT("%s returning " #x, __func__); \
	return x; \
} while (0)
#define RETURN_CODEVAL(x) do { \
	switch (x) { \
	case SP_OK: RETURN_CODE(SP_OK); \
	case SP_ERR_ARG: RETURN_CODE(SP_ERR_ARG); \
	case SP_ERR_FAIL: RETURN_CODE(SP_ERR_FAIL); \
	case SP_ERR_MEM: RETURN_CODE(SP_ERR_MEM); \
	case SP_ERR_SUPP: RETURN_CODE(SP_ERR_SUPP); \
	default: RETURN_CODE(SP_ERR_FAIL); \
	} \
} while (0)
#define RETURN_OK() RETURN_CODE(SP_OK);
#define RETURN_ERROR(err, msg) do { \
	DEBUG_ERROR(err, msg); \
	return err; \
} while (0)
#define RETURN_FAIL(msg) do { \
	DEBUG_FAIL(msg); \
	return SP_ERR_FAIL; \
} while (0)
#define RETURN_INT(x) do { \
	int _x = x; \
	DEBUG_FMT("%s returning %d", __func__, _x); \
	return _x; \
} while (0)
#define RETURN_STRING(x) do { \
	char *_x = x; \
	DEBUG_FMT("%s returning %s", __func__, _x); \
	return _x; \
} while (0)
#define RETURN_POINTER(x) do { \
	void *_x = x; \
	DEBUG_FMT("%s returning %p", __func__, _x); \
	return _x; \
} while (0)
#define SET_ERROR(val, err, msg) do { DEBUG_ERROR(err, msg); val = err; } while (0)
#define SET_FAIL(val, msg) do { DEBUG_FAIL(msg); val = SP_ERR_FAIL; } while (0)
#define TRACE(fmt, ...) DEBUG_FMT("%s(" fmt ") called", __func__, __VA_ARGS__)
#define TRACE_VOID() DEBUG_FMT("%s() called", __func__)

#define TRY(x) do { int retval = x; if (retval != SP_OK) RETURN_CODEVAL(retval); } while (0)

SP_PRIV struct sp_port **list_append(struct sp_port **list, const char *portname);

/* OS-specific Helper functions. */
SP_PRIV enum sp_return get_port_details(struct sp_port *port);
SP_PRIV enum sp_return list_ports(struct sp_port ***list);

/* Timing abstraction */

struct time {
#ifdef _WIN32
	int64_t ticks;
#else
	struct timeval tv;
#endif
};

struct timeout {
	unsigned int ms, limit_ms;
	struct time start, now, end, delta, delta_max;
	struct timeval delta_tv;
	bool calls_started, overflow;
};

SP_PRIV void time_get(struct time *time);
SP_PRIV void time_set_ms(struct time *time, unsigned int ms);
SP_PRIV void time_add(const struct time *a, const struct time *b, struct time *result);
SP_PRIV void time_sub(const struct time *a, const struct time *b, struct time *result);
SP_PRIV bool time_greater(const struct time *a, const struct time *b);
SP_PRIV void time_as_timeval(const struct time *time, struct timeval *tv);
SP_PRIV unsigned int time_as_ms(const struct time *time);
SP_PRIV void timeout_start(struct timeout *timeout, unsigned int timeout_ms);
SP_PRIV void timeout_limit(struct timeout *timeout, unsigned int limit_ms);
SP_PRIV bool timeout_check(struct timeout *timeout);
SP_PRIV void timeout_update(struct timeout *timeout);
SP_PRIV struct timeval *timeout_timeval(struct timeout *timeout);
SP_PRIV unsigned int timeout_remaining_ms(struct timeout *timeout);

#endif

/*** End of inlined file: libserialport_internal.h ***/

static const struct std_baudrate std_baudrates[] = {
#ifdef _WIN32
	/*
	 * The baudrates 50/75/134/150/200/1800/230400/460800 do not seem to
	 * have documented CBR_* macros.
	 */
	BAUD(110), BAUD(300), BAUD(600), BAUD(1200), BAUD(2400), BAUD(4800),
	BAUD(9600), BAUD(14400), BAUD(19200), BAUD(38400), BAUD(57600),
	BAUD(115200), BAUD(128000), BAUD(256000),
#else
	BAUD(50), BAUD(75), BAUD(110), BAUD(134), BAUD(150), BAUD(200),
	BAUD(300), BAUD(600), BAUD(1200), BAUD(1800), BAUD(2400), BAUD(4800),
	BAUD(9600), BAUD(19200), BAUD(38400), BAUD(57600), BAUD(115200),
	BAUD(230400),
#if !defined(__APPLE__) && !defined(__OpenBSD__)
	BAUD(460800),
#endif
#endif
};

#define NUM_STD_BAUDRATES ARRAY_SIZE(std_baudrates)

void (*sp_debug_handler)(const char *format, ...) = sp_default_debug_handler;

static enum sp_return get_config(struct sp_port *port, struct port_data *data,
	struct sp_port_config *config);

static enum sp_return set_config(struct sp_port *port, struct port_data *data,
	const struct sp_port_config *config);

SP_API enum sp_return sp_get_port_by_name(const char *portname, struct sp_port **port_ptr)
{
	struct sp_port *port;
#ifndef NO_PORT_METADATA
	enum sp_return ret;
#endif
	size_t len;

	TRACE("%s, %p", portname, port_ptr);

	if (!port_ptr)
		RETURN_ERROR(SP_ERR_ARG, "Null result pointer");

	*port_ptr = NULL;

	if (!portname)
		RETURN_ERROR(SP_ERR_ARG, "Null port name");

	DEBUG_FMT("Building structure for port %s", portname);

#if !defined(_WIN32) && defined(HAVE_REALPATH)
	/*
	 * get_port_details() below tries to be too smart and figure out
	 * some transport properties from the port name which breaks with
	 * symlinks. Therefore we canonicalize the portname first.
	 */
	char pathbuf[PATH_MAX + 1];
	char *res = realpath(portname, pathbuf);
	if (!res)
		RETURN_ERROR(SP_ERR_ARG, "Could not retrieve realpath behind port name");

	portname = pathbuf;
#endif

	if (!(port = malloc(sizeof(struct sp_port))))
		RETURN_ERROR(SP_ERR_MEM, "Port structure malloc failed");

	len = strlen(portname) + 1;

	if (!(port->name = malloc(len))) {
		free(port);
		RETURN_ERROR(SP_ERR_MEM, "Port name malloc failed");
	}

	memcpy(port->name, portname, len);

#ifdef _WIN32
	port->usb_path = NULL;
	port->hdl = INVALID_HANDLE_VALUE;
	port->write_buf = NULL;
	port->write_buf_size = 0;
#else
	port->fd = -1;
#endif

	port->description = NULL;
	port->transport = SP_TRANSPORT_NATIVE;
	port->usb_bus = -1;
	port->usb_address = -1;
	port->usb_vid = -1;
	port->usb_pid = -1;
	port->usb_manufacturer = NULL;
	port->usb_product = NULL;
	port->usb_serial = NULL;
	port->bluetooth_address = NULL;

#ifndef NO_PORT_METADATA
	if ((ret = get_port_details(port)) != SP_OK) {
		sp_free_port(port);
		return ret;
	}
#endif

	*port_ptr = port;

	RETURN_OK();
}

SP_API char *sp_get_port_name(const struct sp_port *port)
{
	TRACE("%p", port);

	if (!port)
		return NULL;

	RETURN_STRING(port->name);
}

SP_API char *sp_get_port_description(const struct sp_port *port)
{
	TRACE("%p", port);

	if (!port || !port->description)
		return NULL;

	RETURN_STRING(port->description);
}

SP_API enum sp_transport sp_get_port_transport(const struct sp_port *port)
{
	TRACE("%p", port);

	RETURN_INT(port ? port->transport : SP_TRANSPORT_NATIVE);
}

SP_API enum sp_return sp_get_port_usb_bus_address(const struct sp_port *port,
                                                  int *usb_bus,int *usb_address)
{
	TRACE("%p", port);

	if (!port)
		RETURN_ERROR(SP_ERR_ARG, "Null port");
	if (port->transport != SP_TRANSPORT_USB)
		RETURN_ERROR(SP_ERR_ARG, "Port does not use USB transport");
	if (port->usb_bus < 0 || port->usb_address < 0)
		RETURN_ERROR(SP_ERR_SUPP, "Bus and address values are not available");

	if (usb_bus)
		*usb_bus = port->usb_bus;
	if (usb_address)
		*usb_address = port->usb_address;

	RETURN_OK();
}

SP_API enum sp_return sp_get_port_usb_vid_pid(const struct sp_port *port,
                                              int *usb_vid, int *usb_pid)
{
	TRACE("%p", port);

	if (!port)
		RETURN_ERROR(SP_ERR_ARG, "Null port");
	if (port->transport != SP_TRANSPORT_USB)
		RETURN_ERROR(SP_ERR_ARG, "Port does not use USB transport");
	if (port->usb_vid < 0 || port->usb_pid < 0)
		RETURN_ERROR(SP_ERR_SUPP, "VID:PID values are not available");

	if (usb_vid)
		*usb_vid = port->usb_vid;
	if (usb_pid)
		*usb_pid = port->usb_pid;

	RETURN_OK();
}

SP_API char *sp_get_port_usb_manufacturer(const struct sp_port *port)
{
	TRACE("%p", port);

	if (!port || port->transport != SP_TRANSPORT_USB || !port->usb_manufacturer)
		return NULL;

	RETURN_STRING(port->usb_manufacturer);
}

SP_API char *sp_get_port_usb_product(const struct sp_port *port)
{
	TRACE("%p", port);

	if (!port || port->transport != SP_TRANSPORT_USB || !port->usb_product)
		return NULL;

	RETURN_STRING(port->usb_product);
}

SP_API char *sp_get_port_usb_serial(const struct sp_port *port)
{
	TRACE("%p", port);

	if (!port || port->transport != SP_TRANSPORT_USB || !port->usb_serial)
		return NULL;

	RETURN_STRING(port->usb_serial);
}

SP_API char *sp_get_port_bluetooth_address(const struct sp_port *port)
{
	TRACE("%p", port);

	if (!port || port->transport != SP_TRANSPORT_BLUETOOTH
	    || !port->bluetooth_address)
		return NULL;

	RETURN_STRING(port->bluetooth_address);
}

SP_API enum sp_return sp_get_port_handle(const struct sp_port *port,
                                         void *result_ptr)
{
	TRACE("%p, %p", port, result_ptr);

	if (!port)
		RETURN_ERROR(SP_ERR_ARG, "Null port");
	if (!result_ptr)
		RETURN_ERROR(SP_ERR_ARG, "Null result pointer");

#ifdef _WIN32
	HANDLE *handle_ptr = result_ptr;
	*handle_ptr = port->hdl;
#else
	int *fd_ptr = result_ptr;
	*fd_ptr = port->fd;
#endif

	RETURN_OK();
}

SP_API enum sp_return sp_copy_port(const struct sp_port *port,
                                   struct sp_port **copy_ptr)
{
	TRACE("%p, %p", port, copy_ptr);

	if (!copy_ptr)
		RETURN_ERROR(SP_ERR_ARG, "Null result pointer");

	*copy_ptr = NULL;

	if (!port)
		RETURN_ERROR(SP_ERR_ARG, "Null port");

	if (!port->name)
		RETURN_ERROR(SP_ERR_ARG, "Null port name");

	DEBUG("Copying port structure");

	RETURN_INT(sp_get_port_by_name(port->name, copy_ptr));
}

SP_API void sp_free_port(struct sp_port *port)
{
	TRACE("%p", port);

	if (!port) {
		DEBUG("Null port");
		RETURN();
	}

	DEBUG("Freeing port structure");

	if (port->name)
		free(port->name);
	if (port->description)
		free(port->description);
	if (port->usb_manufacturer)
		free(port->usb_manufacturer);
	if (port->usb_product)
		free(port->usb_product);
	if (port->usb_serial)
		free(port->usb_serial);
	if (port->bluetooth_address)
		free(port->bluetooth_address);
#ifdef _WIN32
	if (port->usb_path)
		free(port->usb_path);
	if (port->write_buf)
		free(port->write_buf);
#endif

	free(port);

	RETURN();
}

SP_PRIV struct sp_port **list_append(struct sp_port **list,
                                     const char *portname)
{
	void *tmp;
	size_t count;

	for (count = 0; list[count]; count++)
		;
	if (!(tmp = realloc(list, sizeof(struct sp_port *) * (count + 2))))
		goto fail;
	list = tmp;
	if (sp_get_port_by_name(portname, &list[count]) != SP_OK)
		goto fail;
	list[count + 1] = NULL;
	return list;

fail:
	sp_free_port_list(list);
	return NULL;
}

SP_API enum sp_return sp_list_ports(struct sp_port ***list_ptr)
{
#ifndef NO_ENUMERATION
	struct sp_port **list;
	int ret;
#endif

	TRACE("%p", list_ptr);

	if (!list_ptr)
		RETURN_ERROR(SP_ERR_ARG, "Null result pointer");

	*list_ptr = NULL;

#ifdef NO_ENUMERATION
	RETURN_ERROR(SP_ERR_SUPP, "Enumeration not supported on this platform");
#else
	DEBUG("Enumerating ports");

	if (!(list = malloc(sizeof(struct sp_port *))))
		RETURN_ERROR(SP_ERR_MEM, "Port list malloc failed");

	list[0] = NULL;

	ret = list_ports(&list);

	if (ret == SP_OK) {
		*list_ptr = list;
	} else {
		sp_free_port_list(list);
		*list_ptr = NULL;
	}

	RETURN_CODEVAL(ret);
#endif
}

SP_API void sp_free_port_list(struct sp_port **list)
{
	unsigned int i;

	TRACE("%p", list);

	if (!list) {
		DEBUG("Null list");
		RETURN();
	}

	DEBUG("Freeing port list");

	for (i = 0; list[i]; i++)
		sp_free_port(list[i]);
	free(list);

	RETURN();
}

#define CHECK_PORT() do { \
	if (!port) \
		RETURN_ERROR(SP_ERR_ARG, "Null port"); \
	if (!port->name) \
		RETURN_ERROR(SP_ERR_ARG, "Null port name"); \
} while (0)
#ifdef _WIN32
#define CHECK_PORT_HANDLE() do { \
	if (port->hdl == INVALID_HANDLE_VALUE) \
		RETURN_ERROR(SP_ERR_ARG, "Port not open"); \
} while (0)
#else
#define CHECK_PORT_HANDLE() do { \
	if (port->fd < 0) \
		RETURN_ERROR(SP_ERR_ARG, "Port not open"); \
} while (0)
#endif
#define CHECK_OPEN_PORT() do { \
	CHECK_PORT(); \
	CHECK_PORT_HANDLE(); \
} while (0)

#ifdef WIN32
/** To be called after port receive buffer is emptied. */
static enum sp_return restart_wait(struct sp_port *port)
{
	DWORD wait_result;

	if (port->wait_running) {
		/* Check status of running wait operation. */
		if (GetOverlappedResult(port->hdl, &port->wait_ovl,
				&wait_result, FALSE)) {
			DEBUG("Previous wait completed");
			port->last_wait_thread_exited = FALSE;
			port->wait_running = FALSE;
		} else if (GetLastError() == ERROR_OPERATION_ABORTED) {
			/* This error is returned if the last thread that called
			 * restart_wait() has exited while WaitCommEvent() was
			 * still active. In that case we don't consider that to
			 * be an error. Just restart the wait procedure instead.
			 */
			DEBUG("Previous wait ended due to previous thread exiting");
			/* We need to record that the wait thread exited before
			 * we called WaitCommEvent(). This is because the exit of
			 * the previous thread always generates a spurious wakeup,
			 * and if no data has been received in the mean time, the
			 * WaitCommEvent() wouldn't be restarted a second time by
			 * restart_wait_if_needed() after a read call after the
			 * spurious wakeup.
			 */
			port->last_wait_thread_exited = TRUE;
			port->wait_running = FALSE;
		} else if (GetLastError() == ERROR_IO_INCOMPLETE) {
			DEBUG("Previous wait still running");
			port->last_wait_thread_exited = FALSE;
			RETURN_OK();
		} else {
			RETURN_FAIL("GetOverlappedResult() failed");
		}
	}

	if (!port->wait_running) {
		/* Start new wait operation. */
		if (WaitCommEvent(port->hdl, &port->events,
				&port->wait_ovl)) {
			DEBUG("New wait returned, events already pending");
		} else if (GetLastError() == ERROR_IO_PENDING) {
			DEBUG("New wait running in background");
			port->wait_running = TRUE;
		} else {
			RETURN_FAIL("WaitCommEvent() failed");
		}
	}

	RETURN_OK();
}
#endif

SP_API enum sp_return sp_open(struct sp_port *port, enum sp_mode flags)
{
	struct port_data data;
	struct sp_port_config config;
	enum sp_return ret;

	TRACE("%p, 0x%x", port, flags);

	CHECK_PORT();

	if (flags > SP_MODE_READ_WRITE)
		RETURN_ERROR(SP_ERR_ARG, "Invalid flags");

	DEBUG_FMT("Opening port %s", port->name);

#ifdef _WIN32
	DWORD desired_access = 0, flags_and_attributes = 0, errors;
	char *escaped_port_name;
	COMSTAT status;

	/* Prefix port name with '\\.\' to work with ports above COM9. */
	if (!(escaped_port_name = malloc(strlen(port->name) + 5)))
		RETURN_ERROR(SP_ERR_MEM, "Escaped port name malloc failed");
	sprintf(escaped_port_name, "\\\\.\\%s", port->name);

	/* Map 'flags' to the OS-specific settings. */
	flags_and_attributes = FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED;
	if (flags & SP_MODE_READ)
		desired_access |= GENERIC_READ;
	if (flags & SP_MODE_WRITE)
		desired_access |= GENERIC_WRITE;

	port->hdl = CreateFileA(escaped_port_name, desired_access, 0, 0,
			 OPEN_EXISTING, flags_and_attributes, 0);

	free(escaped_port_name);

	if (port->hdl == INVALID_HANDLE_VALUE)
		RETURN_FAIL("Port CreateFile() failed");

	/* All timeouts initially disabled. */
	port->timeouts.ReadIntervalTimeout = 0;
	port->timeouts.ReadTotalTimeoutMultiplier = 0;
	port->timeouts.ReadTotalTimeoutConstant = 0;
	port->timeouts.WriteTotalTimeoutMultiplier = 0;
	port->timeouts.WriteTotalTimeoutConstant = 0;

	if (SetCommTimeouts(port->hdl, &port->timeouts) == 0) {
		sp_close(port);
		RETURN_FAIL("SetCommTimeouts() failed");
	}

	/* Prepare OVERLAPPED structures. */
#define INIT_OVERLAPPED(ovl) do { \
	memset(&port->ovl, 0, sizeof(port->ovl)); \
	port->ovl.hEvent = INVALID_HANDLE_VALUE; \
	if ((port->ovl.hEvent = CreateEvent(NULL, TRUE, TRUE, NULL)) \
			== INVALID_HANDLE_VALUE) { \
		sp_close(port); \
		RETURN_FAIL(#ovl "CreateEvent() failed"); \
	} \
} while (0)

	INIT_OVERLAPPED(read_ovl);
	INIT_OVERLAPPED(write_ovl);
	INIT_OVERLAPPED(wait_ovl);

	/* Set event mask for RX and error events. */
	if (SetCommMask(port->hdl, EV_RXCHAR | EV_ERR) == 0) {
		sp_close(port);
		RETURN_FAIL("SetCommMask() failed");
	}

	port->writing = FALSE;
	port->wait_running = FALSE;

	ret = restart_wait(port);

	if (ret < 0) {
		sp_close(port);
		RETURN_CODEVAL(ret);
	}
#else
	int flags_local = O_NONBLOCK | O_NOCTTY | O_CLOEXEC;

	/* Map 'flags' to the OS-specific settings. */
	if ((flags & SP_MODE_READ_WRITE) == SP_MODE_READ_WRITE)
		flags_local |= O_RDWR;
	else if (flags & SP_MODE_READ)
		flags_local |= O_RDONLY;
	else if (flags & SP_MODE_WRITE)
		flags_local |= O_WRONLY;

	if ((port->fd = open(port->name, flags_local)) < 0)
		RETURN_FAIL("open() failed");

	/*
	 * On POSIX in the default case the file descriptor of a serial port
	 * is not opened exclusively. Therefore the settings of a port are
	 * overwritten if the serial port is opened a second time. Windows
	 * opens all serial ports exclusively.
	 * So the idea is to open the serial ports alike in the exclusive mode.
	 *
	 * ioctl(*, TIOCEXCL) defines the file descriptor as exclusive. So all
	 * further open calls on the serial port will fail.
	 *
	 * There is a race condition if two processes open the same serial
	 * port. None of the processes will notice the exclusive ownership of
	 * the other process because ioctl() doesn't return an error code if
	 * the file descriptor is already marked as exclusive.
	 * This can be solved with flock(). It returns an error if the file
	 * descriptor is already locked by another process.
	 */
#ifdef HAVE_FLOCK
	if (flock(port->fd, LOCK_EX | LOCK_NB) < 0)
		RETURN_FAIL("flock() failed");
#endif

#ifdef TIOCEXCL
	/*
	 * Before Linux 3.8 ioctl(*, TIOCEXCL) was not implemented and could
	 * lead to EINVAL or ENOTTY.
	 * These errors aren't fatal and can be ignored.
	 */
	if (ioctl(port->fd, TIOCEXCL) < 0 && errno != EINVAL && errno != ENOTTY)
		RETURN_FAIL("ioctl() failed");
#endif

#endif

	ret = get_config(port, &data, &config);

	if (ret < 0) {
		sp_close(port);
		RETURN_CODEVAL(ret);
	}

	/*
	 * Assume a default baudrate if the OS does not provide one.
	 * Cannot assign -1 here since Windows holds the baudrate in
	 * the DCB and does not configure the rate individually.
	 */
	if (config.baudrate == 0) {
		config.baudrate = 9600;
	}

	/* Set sane port settings. */
#ifdef _WIN32
	data.dcb.fBinary = TRUE;
	data.dcb.fDsrSensitivity = FALSE;
	data.dcb.fErrorChar = FALSE;
	data.dcb.fNull = FALSE;
	data.dcb.fAbortOnError = FALSE;
#else
	/* Turn off all fancy termios tricks, give us a raw channel. */
	data.term.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP | INLCR | IGNCR | ICRNL | IMAXBEL);
#ifdef IUCLC
	data.term.c_iflag &= ~IUCLC;
#endif
	data.term.c_oflag &= ~(OPOST | ONLCR | OCRNL | ONOCR | ONLRET);
#ifdef OLCUC
	data.term.c_oflag &= ~OLCUC;
#endif
#ifdef NLDLY
	data.term.c_oflag &= ~NLDLY;
#endif
#ifdef CRDLY
	data.term.c_oflag &= ~CRDLY;
#endif
#ifdef TABDLY
	data.term.c_oflag &= ~TABDLY;
#endif
#ifdef BSDLY
	data.term.c_oflag &= ~BSDLY;
#endif
#ifdef VTDLY
	data.term.c_oflag &= ~VTDLY;
#endif
#ifdef FFDLY
	data.term.c_oflag &= ~FFDLY;
#endif
#ifdef OFILL
	data.term.c_oflag &= ~OFILL;
#endif
	data.term.c_lflag &= ~(ISIG | ICANON | ECHO | IEXTEN);
	data.term.c_cc[VMIN] = 0;
	data.term.c_cc[VTIME] = 0;

	/* Ignore modem status lines; enable receiver; leave control lines alone on close. */
	data.term.c_cflag |= (CLOCAL | CREAD);
	data.term.c_cflag &= ~(HUPCL);
#endif

#ifdef _WIN32
	if (ClearCommError(port->hdl, &errors, &status) == 0)
		RETURN_FAIL("ClearCommError() failed");
#endif

	ret = set_config(port, &data, &config);

	if (ret < 0) {
		sp_close(port);
		RETURN_CODEVAL(ret);
	}

	RETURN_OK();
}

SP_API enum sp_return sp_close(struct sp_port *port)
{
	TRACE("%p", port);

	CHECK_OPEN_PORT();

	DEBUG_FMT("Closing port %s", port->name);

#ifdef _WIN32
	/* Returns non-zero upon success, 0 upon failure. */
	if (CloseHandle(port->hdl) == 0)
		RETURN_FAIL("Port CloseHandle() failed");
	port->hdl = INVALID_HANDLE_VALUE;

	/* Close event handles for overlapped structures. */
#define CLOSE_OVERLAPPED(ovl) do { \
	if (port->ovl.hEvent != INVALID_HANDLE_VALUE && \
		CloseHandle(port->ovl.hEvent) == 0) \
		RETURN_FAIL(# ovl "event CloseHandle() failed"); \
} while (0)
	CLOSE_OVERLAPPED(read_ovl);
	CLOSE_OVERLAPPED(write_ovl);
	CLOSE_OVERLAPPED(wait_ovl);

	if (port->write_buf) {
		free(port->write_buf);
		port->write_buf = NULL;
	}
#else
#ifdef TIOCNXCL
	ioctl(port->fd, TIOCNXCL);
#endif

	/* Returns 0 upon success, -1 upon failure. */
	if (close(port->fd) == -1)
		RETURN_FAIL("close() failed");
	port->fd = -1;
#endif

	RETURN_OK();
}

SP_API enum sp_return sp_flush(struct sp_port *port, enum sp_buffer buffers)
{
	TRACE("%p, 0x%x", port, buffers);

	CHECK_OPEN_PORT();

	if (buffers > SP_BUF_BOTH)
		RETURN_ERROR(SP_ERR_ARG, "Invalid buffer selection");

	const char *buffer_names[] = {"no", "input", "output", "both"};

	DEBUG_FMT("Flushing %s buffers on port %s",
		buffer_names[buffers], port->name);

#ifdef _WIN32
	DWORD flags = 0;
	if (buffers & SP_BUF_INPUT)
		flags |= PURGE_RXCLEAR;
	if (buffers & SP_BUF_OUTPUT)
		flags |= PURGE_TXCLEAR;

	/* Returns non-zero upon success, 0 upon failure. */
	if (PurgeComm(port->hdl, flags) == 0)
		RETURN_FAIL("PurgeComm() failed");

	if (buffers & SP_BUF_INPUT)
		TRY(restart_wait(port));
#else
	int flags = 0;
	if (buffers == SP_BUF_BOTH)
		flags = TCIOFLUSH;
	else if (buffers == SP_BUF_INPUT)
		flags = TCIFLUSH;
	else if (buffers == SP_BUF_OUTPUT)
		flags = TCOFLUSH;

	/* Returns 0 upon success, -1 upon failure. */
	if (tcflush(port->fd, flags) < 0)
		RETURN_FAIL("tcflush() failed");
#endif
	RETURN_OK();
}

SP_API enum sp_return sp_drain(struct sp_port *port)
{
	TRACE("%p", port);

	CHECK_OPEN_PORT();

	DEBUG_FMT("Draining port %s", port->name);

#ifdef _WIN32
	/* Returns non-zero upon success, 0 upon failure. */
	if (FlushFileBuffers(port->hdl) == 0)
		RETURN_FAIL("FlushFileBuffers() failed");
	RETURN_OK();
#else
	int result;
	while (1) {
#if defined(__ANDROID__) && (__ANDROID_API__ < 21)
		/* Android only has tcdrain from platform 21 onwards.
		 * On previous API versions, use the ioctl directly. */
		int arg = 1;
		result = ioctl(port->fd, TCSBRK, &arg);
#else
		result = tcdrain(port->fd);
#endif
		if (result < 0) {
			if (errno == EINTR) {
				DEBUG("tcdrain() was interrupted");
				continue;
			} else {
				RETURN_FAIL("tcdrain() failed");
			}
		} else {
			RETURN_OK();
		}
	}
#endif
}

#ifdef _WIN32
static enum sp_return await_write_completion(struct sp_port *port)
{
	TRACE("%p", port);
	DWORD bytes_written;
	BOOL result;

	/* Wait for previous non-blocking write to complete, if any. */
	if (port->writing) {
		DEBUG("Waiting for previous write to complete");
		result = GetOverlappedResult(port->hdl, &port->write_ovl, &bytes_written, TRUE);
		port->writing = 0;
		if (!result)
			RETURN_FAIL("Previous write failed to complete");
		DEBUG("Previous write completed");
	}

	RETURN_OK();
}
#endif

SP_API enum sp_return sp_blocking_write(struct sp_port *port, const void *buf,
                                        size_t count, unsigned int timeout_ms)
{
	TRACE("%p, %p, %d, %d", port, buf, count, timeout_ms);

	CHECK_OPEN_PORT();

	if (!buf)
		RETURN_ERROR(SP_ERR_ARG, "Null buffer");

	if (timeout_ms)
		DEBUG_FMT("Writing %d bytes to port %s, timeout %d ms",
			count, port->name, timeout_ms);
	else
		DEBUG_FMT("Writing %d bytes to port %s, no timeout",
			count, port->name);

	if (count == 0)
		RETURN_INT(0);

#ifdef _WIN32
	DWORD remaining_ms, write_size, bytes_written;
	size_t remaining_bytes, total_bytes_written = 0;
	const uint8_t *write_ptr = (uint8_t *) buf;
	bool result;
	struct timeout timeout;

	timeout_start(&timeout, timeout_ms);

	TRY(await_write_completion(port));

	while (total_bytes_written < count) {

		if (timeout_check(&timeout))
			break;

		remaining_ms = timeout_remaining_ms(&timeout);

		if (port->timeouts.WriteTotalTimeoutConstant != remaining_ms) {
			port->timeouts.WriteTotalTimeoutConstant = remaining_ms;
			if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
				RETURN_FAIL("SetCommTimeouts() failed");
		}

		/* Reduce write size if it exceeds the WriteFile limit. */
		remaining_bytes = count - total_bytes_written;
		if (remaining_bytes > WRITEFILE_MAX_SIZE)
			write_size = WRITEFILE_MAX_SIZE;
		else
			write_size = (DWORD) remaining_bytes;

		/* Start write. */

		result = WriteFile(port->hdl, write_ptr, write_size, NULL, &port->write_ovl);

		timeout_update(&timeout);

		if (result) {
			DEBUG("Write completed immediately");
			bytes_written = write_size;
		} else if (GetLastError() == ERROR_IO_PENDING) {
			DEBUG("Waiting for write to complete");
			if (GetOverlappedResult(port->hdl, &port->write_ovl, &bytes_written, TRUE) == 0) {
				if (GetLastError() == ERROR_SEM_TIMEOUT) {
					DEBUG("Write timed out");
					break;
				} else {
					RETURN_FAIL("GetOverlappedResult() failed");
				}
			}
			DEBUG_FMT("Write completed, %d/%d bytes written", bytes_written, write_size);
		} else {
			RETURN_FAIL("WriteFile() failed");
		}

		write_ptr += bytes_written;
		total_bytes_written += bytes_written;
	}

	RETURN_INT((int) total_bytes_written);
#else
	size_t bytes_written = 0;
	unsigned char *ptr = (unsigned char *) buf;
	struct timeout timeout;
	fd_set fds;
	ssize_t result;

	timeout_start(&timeout, timeout_ms);

	FD_ZERO(&fds);
	FD_SET(port->fd, &fds);

	/* Loop until we have written the requested number of bytes. */
	while (bytes_written < count) {

		if (timeout_check(&timeout))
			break;

		result = select(port->fd + 1, NULL, &fds, NULL, timeout_timeval(&timeout));

		timeout_update(&timeout);

		if (result < 0) {
			if (errno == EINTR) {
				DEBUG("select() call was interrupted, repeating");
				continue;
			} else {
				RETURN_FAIL("select() failed");
			}
		} else if (result == 0) {
			/* Timeout has expired. */
			break;
		}

		/* Do write. */
		result = write(port->fd, ptr, count - bytes_written);

		if (result < 0) {
			if (errno == EAGAIN)
				/* This shouldn't happen because we did a select() first, but handle anyway. */
				continue;
			else
				/* This is an actual failure. */
				RETURN_FAIL("write() failed");
		}

		bytes_written += result;
		ptr += result;
	}

	if (bytes_written < count)
		DEBUG("Write timed out");

	RETURN_INT(bytes_written);
#endif
}

SP_API enum sp_return sp_nonblocking_write(struct sp_port *port,
                                           const void *buf, size_t count)
{
	TRACE("%p, %p, %d", port, buf, count);

	CHECK_OPEN_PORT();

	if (!buf)
		RETURN_ERROR(SP_ERR_ARG, "Null buffer");

	DEBUG_FMT("Writing up to %d bytes to port %s", count, port->name);

	if (count == 0)
		RETURN_INT(0);

#ifdef _WIN32
	size_t buf_bytes;

	/* Check whether previous write is complete. */
	if (port->writing) {
		if (HasOverlappedIoCompleted(&port->write_ovl)) {
			DEBUG("Previous write completed");
			port->writing = 0;
		} else {
			DEBUG("Previous write not complete");
			/* Can't take a new write until the previous one finishes. */
			RETURN_INT(0);
		}
	}

	/* Set timeout. */
	if (port->timeouts.WriteTotalTimeoutConstant != 0) {
		port->timeouts.WriteTotalTimeoutConstant = 0;
		if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
			RETURN_FAIL("SetCommTimeouts() failed");
	}

	/* Reduce count if it exceeds the WriteFile limit. */
	if (count > WRITEFILE_MAX_SIZE)
		count = WRITEFILE_MAX_SIZE;

	/* Copy data to our write buffer. */
	buf_bytes = min(port->write_buf_size, count);
	memcpy(port->write_buf, buf, buf_bytes);

	/* Start asynchronous write. */
	if (WriteFile(port->hdl, port->write_buf, (DWORD) buf_bytes, NULL, &port->write_ovl) == 0) {
		if (GetLastError() == ERROR_IO_PENDING) {
			if ((port->writing = !HasOverlappedIoCompleted(&port->write_ovl)))
				DEBUG("Asynchronous write completed immediately");
			else
				DEBUG("Asynchronous write running");
		} else {
			/* Actual failure of some kind. */
			RETURN_FAIL("WriteFile() failed");
		}
	}

	DEBUG("All bytes written immediately");

	RETURN_INT((int) buf_bytes);
#else
	/* Returns the number of bytes written, or -1 upon failure. */
	ssize_t written = write(port->fd, buf, count);

	if (written < 0) {
		if (errno == EAGAIN)
			// Buffer is full, no bytes written.
			RETURN_INT(0);
		else
			RETURN_FAIL("write() failed");
	} else {
		RETURN_INT(written);
	}
#endif
}

#ifdef _WIN32
/* Restart wait operation if buffer was emptied. */
static enum sp_return restart_wait_if_needed(struct sp_port *port, unsigned int bytes_read)
{
	DWORD errors;
	COMSTAT comstat;

	/* Only skip restarting the wait operation if we didn't have a
	 * wakeup immediately following the exit of the last thread that
	 * re-initiated the wait loop.
	 */
	if (!port->last_wait_thread_exited && bytes_read == 0)
		RETURN_OK();

	if (ClearCommError(port->hdl, &errors, &comstat) == 0)
		RETURN_FAIL("ClearCommError() failed");

	if (comstat.cbInQue == 0)
		TRY(restart_wait(port));

	RETURN_OK();
}
#endif

SP_API enum sp_return sp_blocking_read(struct sp_port *port, void *buf,
                                       size_t count, unsigned int timeout_ms)
{
	TRACE("%p, %p, %d, %d", port, buf, count, timeout_ms);

	CHECK_OPEN_PORT();

	if (!buf)
		RETURN_ERROR(SP_ERR_ARG, "Null buffer");

	if (timeout_ms)
		DEBUG_FMT("Reading %d bytes from port %s, timeout %d ms",
			count, port->name, timeout_ms);
	else
		DEBUG_FMT("Reading %d bytes from port %s, no timeout",
			count, port->name);

	if (count == 0)
		RETURN_INT(0);

#ifdef _WIN32
	DWORD bytes_read;

	/* Set timeout. */
	if (port->timeouts.ReadIntervalTimeout != 0 ||
			port->timeouts.ReadTotalTimeoutMultiplier != 0 ||
			port->timeouts.ReadTotalTimeoutConstant != timeout_ms) {
		port->timeouts.ReadIntervalTimeout = 0;
		port->timeouts.ReadTotalTimeoutMultiplier = 0;
		port->timeouts.ReadTotalTimeoutConstant = timeout_ms;
		if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
			RETURN_FAIL("SetCommTimeouts() failed");
	}

	/* Start read. */
	if (ReadFile(port->hdl, buf, (DWORD) count, NULL, &port->read_ovl)) {
		DEBUG("Read completed immediately");
		bytes_read = (DWORD) count;
	} else if (GetLastError() == ERROR_IO_PENDING) {
		DEBUG("Waiting for read to complete");
		if (GetOverlappedResult(port->hdl, &port->read_ovl, &bytes_read, TRUE) == 0)
			RETURN_FAIL("GetOverlappedResult() failed");
		DEBUG_FMT("Read completed, %d/%d bytes read", bytes_read, count);
	} else {
		RETURN_FAIL("ReadFile() failed");
	}

	TRY(restart_wait_if_needed(port, bytes_read));

	RETURN_INT((int) bytes_read);

#else
	size_t bytes_read = 0;
	unsigned char *ptr = (unsigned char *) buf;
	struct timeout timeout;
	fd_set fds;
	ssize_t result;

	timeout_start(&timeout, timeout_ms);

	FD_ZERO(&fds);
	FD_SET(port->fd, &fds);

	/* Loop until we have the requested number of bytes. */
	while (bytes_read < count) {

		if (timeout_check(&timeout))
			/* Timeout has expired. */
			break;

		result = select(port->fd + 1, &fds, NULL, NULL, timeout_timeval(&timeout));

		timeout_update(&timeout);

		if (result < 0) {
			if (errno == EINTR) {
				DEBUG("select() call was interrupted, repeating");
				continue;
			} else {
				RETURN_FAIL("select() failed");
			}
		} else if (result == 0) {
			/* Timeout has expired. */
			break;
		}

		/* Do read. */
		result = read(port->fd, ptr, count - bytes_read);

		if (result < 0) {
			if (errno == EAGAIN)
				/*
				 * This shouldn't happen because we did a
				 * select() first, but handle anyway.
				 */
				continue;
			else
				/* This is an actual failure. */
				RETURN_FAIL("read() failed");
		}

		bytes_read += result;
		ptr += result;
	}

	if (bytes_read < count)
		DEBUG("Read timed out");

	RETURN_INT(bytes_read);
#endif
}

SP_API enum sp_return sp_blocking_read_next(struct sp_port *port, void *buf,
                                            size_t count, unsigned int timeout_ms)
{
	TRACE("%p, %p, %d, %d", port, buf, count, timeout_ms);

	CHECK_OPEN_PORT();

	if (!buf)
		RETURN_ERROR(SP_ERR_ARG, "Null buffer");

	if (count == 0)
		RETURN_ERROR(SP_ERR_ARG, "Zero count");

	if (timeout_ms)
		DEBUG_FMT("Reading next max %d bytes from port %s, timeout %d ms",
			count, port->name, timeout_ms);
	else
		DEBUG_FMT("Reading next max %d bytes from port %s, no timeout",
			count, port->name);

#ifdef _WIN32
	DWORD bytes_read = 0;

	/* If timeout_ms == 0, set maximum timeout. */
	DWORD timeout_val = (timeout_ms == 0 ? MAXDWORD - 1 : timeout_ms);

	/* Set timeout. */
	if (port->timeouts.ReadIntervalTimeout != MAXDWORD ||
			port->timeouts.ReadTotalTimeoutMultiplier != MAXDWORD ||
			port->timeouts.ReadTotalTimeoutConstant != timeout_val) {
		port->timeouts.ReadIntervalTimeout = MAXDWORD;
		port->timeouts.ReadTotalTimeoutMultiplier = MAXDWORD;
		port->timeouts.ReadTotalTimeoutConstant = timeout_val;
		if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
			RETURN_FAIL("SetCommTimeouts() failed");
	}

	/* Loop until we have at least one byte, or timeout is reached. */
	while (bytes_read == 0) {
		/* Start read. */
		if (ReadFile(port->hdl, buf, (DWORD) count, &bytes_read, &port->read_ovl)) {
			DEBUG("Read completed immediately");
		} else if (GetLastError() == ERROR_IO_PENDING) {
			DEBUG("Waiting for read to complete");
			if (GetOverlappedResult(port->hdl, &port->read_ovl, &bytes_read, TRUE) == 0)
				RETURN_FAIL("GetOverlappedResult() failed");
			if (bytes_read > 0) {
				DEBUG("Read completed");
			} else if (timeout_ms > 0) {
				DEBUG("Read timed out");
				break;
			} else {
				DEBUG("Restarting read");
			}
		} else {
			RETURN_FAIL("ReadFile() failed");
		}
	}

	TRY(restart_wait_if_needed(port, bytes_read));

	RETURN_INT(bytes_read);

#else
	size_t bytes_read = 0;
	struct timeout timeout;
	fd_set fds;
	ssize_t result;

	timeout_start(&timeout, timeout_ms);

	FD_ZERO(&fds);
	FD_SET(port->fd, &fds);

	/* Loop until we have at least one byte, or timeout is reached. */
	while (bytes_read == 0) {

		if (timeout_check(&timeout))
			/* Timeout has expired. */
			break;

		result = select(port->fd + 1, &fds, NULL, NULL, timeout_timeval(&timeout));

		timeout_update(&timeout);

		if (result < 0) {
			if (errno == EINTR) {
				DEBUG("select() call was interrupted, repeating");
				continue;
			} else {
				RETURN_FAIL("select() failed");
			}
		} else if (result == 0) {
			/* Timeout has expired. */
			break;
		}

		/* Do read. */
		result = read(port->fd, buf, count);

		if (result < 0) {
			if (errno == EAGAIN)
				/* This shouldn't happen because we did a select() first, but handle anyway. */
				continue;
			else
				/* This is an actual failure. */
				RETURN_FAIL("read() failed");
		}

		bytes_read = result;
	}

	if (bytes_read == 0)
		DEBUG("Read timed out");

	RETURN_INT(bytes_read);
#endif
}

SP_API enum sp_return sp_nonblocking_read(struct sp_port *port, void *buf,
                                          size_t count)
{
	TRACE("%p, %p, %d", port, buf, count);

	CHECK_OPEN_PORT();

	if (!buf)
		RETURN_ERROR(SP_ERR_ARG, "Null buffer");

	DEBUG_FMT("Reading up to %d bytes from port %s", count, port->name);

#ifdef _WIN32
	DWORD bytes_read;

	/* Set timeout. */
	if (port->timeouts.ReadIntervalTimeout != MAXDWORD ||
			port->timeouts.ReadTotalTimeoutMultiplier != 0 ||
			port->timeouts.ReadTotalTimeoutConstant != 0) {
		port->timeouts.ReadIntervalTimeout = MAXDWORD;
		port->timeouts.ReadTotalTimeoutMultiplier = 0;
		port->timeouts.ReadTotalTimeoutConstant = 0;
		if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
			RETURN_FAIL("SetCommTimeouts() failed");
	}

	/* Do read. */
	if (ReadFile(port->hdl, buf, (DWORD) count, NULL, &port->read_ovl) == 0)
		if (GetLastError() != ERROR_IO_PENDING)
			RETURN_FAIL("ReadFile() failed");

	/* Get number of bytes read. */
	if (GetOverlappedResult(port->hdl, &port->read_ovl, &bytes_read, FALSE) == 0)
		RETURN_FAIL("GetOverlappedResult() failed");

	TRY(restart_wait_if_needed(port, bytes_read));

	RETURN_INT(bytes_read);
#else
	ssize_t bytes_read;

	/* Returns the number of bytes read, or -1 upon failure. */
	if ((bytes_read = read(port->fd, buf, count)) < 0) {
		if (errno == EAGAIN)
			/* No bytes available. */
			bytes_read = 0;
		else
			/* This is an actual failure. */
			RETURN_FAIL("read() failed");
	}
	RETURN_INT(bytes_read);
#endif
}

SP_API enum sp_return sp_input_waiting(struct sp_port *port)
{
	TRACE("%p", port);

	CHECK_OPEN_PORT();

	DEBUG_FMT("Checking input bytes waiting on port %s", port->name);

#ifdef _WIN32
	DWORD errors;
	COMSTAT comstat;

	if (ClearCommError(port->hdl, &errors, &comstat) == 0)
		RETURN_FAIL("ClearCommError() failed");
	RETURN_INT(comstat.cbInQue);
#else
	int bytes_waiting;
	if (ioctl(port->fd, TIOCINQ, &bytes_waiting) < 0)
		RETURN_FAIL("TIOCINQ ioctl failed");
	RETURN_INT(bytes_waiting);
#endif
}

SP_API enum sp_return sp_output_waiting(struct sp_port *port)
{
	TRACE("%p", port);

#ifdef __CYGWIN__
	/* TIOCOUTQ is not defined in Cygwin headers */
	RETURN_ERROR(SP_ERR_SUPP,
			"Getting output bytes waiting is not supported on Cygwin");
#else
	CHECK_OPEN_PORT();

	DEBUG_FMT("Checking output bytes waiting on port %s", port->name);

#ifdef _WIN32
	DWORD errors;
	COMSTAT comstat;

	if (ClearCommError(port->hdl, &errors, &comstat) == 0)
		RETURN_FAIL("ClearCommError() failed");
	RETURN_INT(comstat.cbOutQue);
#else
	int bytes_waiting;
	if (ioctl(port->fd, TIOCOUTQ, &bytes_waiting) < 0)
		RETURN_FAIL("TIOCOUTQ ioctl failed");
	RETURN_INT(bytes_waiting);
#endif
#endif
}

SP_API enum sp_return sp_new_event_set(struct sp_event_set **result_ptr)
{
	struct sp_event_set *result;

	TRACE("%p", result_ptr);

	if (!result_ptr)
		RETURN_ERROR(SP_ERR_ARG, "Null result");

	*result_ptr = NULL;

	if (!(result = malloc(sizeof(struct sp_event_set))))
		RETURN_ERROR(SP_ERR_MEM, "sp_event_set malloc() failed");

	memset(result, 0, sizeof(struct sp_event_set));

	*result_ptr = result;

	RETURN_OK();
}

static enum sp_return add_handle(struct sp_event_set *event_set,
		event_handle handle, enum sp_event mask)
{
	void *new_handles;
	enum sp_event *new_masks;

	TRACE("%p, %d, %d", event_set, handle, mask);

	if (!(new_handles = realloc(event_set->handles,
			sizeof(event_handle) * (event_set->count + 1))))
		RETURN_ERROR(SP_ERR_MEM, "Handle array realloc() failed");

	event_set->handles = new_handles;

	if (!(new_masks = realloc(event_set->masks,
			sizeof(enum sp_event) * (event_set->count + 1))))
		RETURN_ERROR(SP_ERR_MEM, "Mask array realloc() failed");

	event_set->masks = new_masks;

	((event_handle *) event_set->handles)[event_set->count] = handle;
	event_set->masks[event_set->count] = mask;

	event_set->count++;

	RETURN_OK();
}

SP_API enum sp_return sp_add_port_events(struct sp_event_set *event_set,
	const struct sp_port *port, enum sp_event mask)
{
	TRACE("%p, %p, %d", event_set, port, mask);

	if (!event_set)
		RETURN_ERROR(SP_ERR_ARG, "Null event set");

	if (!port)
		RETURN_ERROR(SP_ERR_ARG, "Null port");

	if (mask > (SP_EVENT_RX_READY | SP_EVENT_TX_READY | SP_EVENT_ERROR))
		RETURN_ERROR(SP_ERR_ARG, "Invalid event mask");

	if (!mask)
		RETURN_OK();

#ifdef _WIN32
	enum sp_event handle_mask;
	if ((handle_mask = mask & SP_EVENT_TX_READY))
		TRY(add_handle(event_set, port->write_ovl.hEvent, handle_mask));
	if ((handle_mask = mask & (SP_EVENT_RX_READY | SP_EVENT_ERROR)))
		TRY(add_handle(event_set, port->wait_ovl.hEvent, handle_mask));
#else
	TRY(add_handle(event_set, port->fd, mask));
#endif

	RETURN_OK();
}

SP_API void sp_free_event_set(struct sp_event_set *event_set)
{
	TRACE("%p", event_set);

	if (!event_set) {
		DEBUG("Null event set");
		RETURN();
	}

	DEBUG("Freeing event set");

	if (event_set->handles)
		free(event_set->handles);
	if (event_set->masks)
		free(event_set->masks);

	free(event_set);

	RETURN();
}

SP_API enum sp_return sp_wait(struct sp_event_set *event_set,
                              unsigned int timeout_ms)
{
	TRACE("%p, %d", event_set, timeout_ms);

	if (!event_set)
		RETURN_ERROR(SP_ERR_ARG, "Null event set");

#ifdef _WIN32
	if (WaitForMultipleObjects(event_set->count, event_set->handles, FALSE,
			timeout_ms ? timeout_ms : INFINITE) == WAIT_FAILED)
		RETURN_FAIL("WaitForMultipleObjects() failed");

	RETURN_OK();
#else
	struct timeout timeout;
	int poll_timeout;
	int result;
	struct pollfd *pollfds;
	unsigned int i;

	if (!(pollfds = malloc(sizeof(struct pollfd) * event_set->count)))
		RETURN_ERROR(SP_ERR_MEM, "pollfds malloc() failed");

	for (i = 0; i < event_set->count; i++) {
		pollfds[i].fd = ((int *)event_set->handles)[i];
		pollfds[i].events = 0;
		pollfds[i].revents = 0;
		if (event_set->masks[i] & SP_EVENT_RX_READY)
			pollfds[i].events |= POLLIN;
		if (event_set->masks[i] & SP_EVENT_TX_READY)
			pollfds[i].events |= POLLOUT;
		if (event_set->masks[i] & SP_EVENT_ERROR)
			pollfds[i].events |= POLLERR;
	}

	timeout_start(&timeout, timeout_ms);
	timeout_limit(&timeout, INT_MAX);

	/* Loop until an event occurs. */
	while (1) {

		if (timeout_check(&timeout)) {
			DEBUG("Wait timed out");
			break;
		}

		poll_timeout = (int) timeout_remaining_ms(&timeout);
		if (poll_timeout == 0)
			poll_timeout = -1;

		result = poll(pollfds, event_set->count, poll_timeout);

		timeout_update(&timeout);

		if (result < 0) {
			if (errno == EINTR) {
				DEBUG("poll() call was interrupted, repeating");
				continue;
			} else {
				free(pollfds);
				RETURN_FAIL("poll() failed");
			}
		} else if (result == 0) {
			DEBUG("poll() timed out");
			if (!timeout.overflow)
				break;
		} else {
			DEBUG("poll() completed");
			break;
		}
	}

	free(pollfds);
	RETURN_OK();
#endif
}

#ifdef USE_TERMIOS_SPEED
static enum sp_return get_baudrate(int fd, int *baudrate)
{
	void *data;

	TRACE("%d, %p", fd, baudrate);

	DEBUG("Getting baud rate");

	if (!(data = malloc(get_termios_size())))
		RETURN_ERROR(SP_ERR_MEM, "termios malloc failed");

	if (ioctl(fd, get_termios_get_ioctl(), data) < 0) {
		free(data);
		RETURN_FAIL("Getting termios failed");
	}

	*baudrate = get_termios_speed(data);

	free(data);

	RETURN_OK();
}

static enum sp_return set_baudrate(int fd, int baudrate)
{
	void *data;

	TRACE("%d, %d", fd, baudrate);

	DEBUG("Getting baud rate");

	if (!(data = malloc(get_termios_size())))
		RETURN_ERROR(SP_ERR_MEM, "termios malloc failed");

	if (ioctl(fd, get_termios_get_ioctl(), data) < 0) {
		free(data);
		RETURN_FAIL("Getting termios failed");
	}

	DEBUG("Setting baud rate");

	set_termios_speed(data, baudrate);

	if (ioctl(fd, get_termios_set_ioctl(), data) < 0) {
		free(data);
		RETURN_FAIL("Setting termios failed");
	}

	free(data);

	RETURN_OK();
}
#endif /* USE_TERMIOS_SPEED */

#ifdef USE_TERMIOX
static enum sp_return get_flow(int fd, struct port_data *data)
{
	void *termx;

	TRACE("%d, %p", fd, data);

	DEBUG("Getting advanced flow control");

	if (!(termx = malloc(get_termiox_size())))
		RETURN_ERROR(SP_ERR_MEM, "termiox malloc failed");

	if (ioctl(fd, TCGETX, termx) < 0) {
		free(termx);
		RETURN_FAIL("Getting termiox failed");
	}

	get_termiox_flow(termx, &data->rts_flow, &data->cts_flow,
			&data->dtr_flow, &data->dsr_flow);

	free(termx);

	RETURN_OK();
}

static enum sp_return set_flow(int fd, struct port_data *data)
{
	void *termx;

	TRACE("%d, %p", fd, data);

	DEBUG("Getting advanced flow control");

	if (!(termx = malloc(get_termiox_size())))
		RETURN_ERROR(SP_ERR_MEM, "termiox malloc failed");

	if (ioctl(fd, TCGETX, termx) < 0) {
		free(termx);
		RETURN_FAIL("Getting termiox failed");
	}

	DEBUG("Setting advanced flow control");

	set_termiox_flow(termx, data->rts_flow, data->cts_flow,
			data->dtr_flow, data->dsr_flow);

	if (ioctl(fd, TCSETX, termx) < 0) {
		free(termx);
		RETURN_FAIL("Setting termiox failed");
	}

	free(termx);

	RETURN_OK();
}
#endif /* USE_TERMIOX */

static enum sp_return get_config(struct sp_port *port, struct port_data *data,
	struct sp_port_config *config)
{
	unsigned int i;

	TRACE("%p, %p, %p", port, data, config);

	DEBUG_FMT("Getting configuration for port %s", port->name);

#ifdef _WIN32
	if (!GetCommState(port->hdl, &data->dcb))
		RETURN_FAIL("GetCommState() failed");

	for (i = 0; i < NUM_STD_BAUDRATES; i++) {
		if (data->dcb.BaudRate == std_baudrates[i].index) {
			config->baudrate = std_baudrates[i].value;
			break;
		}
	}

	if (i == NUM_STD_BAUDRATES)
		/* BaudRate field can be either an index or a custom baud rate. */
		config->baudrate = data->dcb.BaudRate;

	config->bits = data->dcb.ByteSize;

	switch (data->dcb.Parity) {
	case NOPARITY:
		config->parity = SP_PARITY_NONE;
		break;
	case ODDPARITY:
		config->parity = SP_PARITY_ODD;
		break;
	case EVENPARITY:
		config->parity = SP_PARITY_EVEN;
		break;
	case MARKPARITY:
		config->parity = SP_PARITY_MARK;
		break;
	case SPACEPARITY:
		config->parity = SP_PARITY_SPACE;
		break;
	default:
		config->parity = -1;
	}

	switch (data->dcb.StopBits) {
	case ONESTOPBIT:
		config->stopbits = 1;
		break;
	case TWOSTOPBITS:
		config->stopbits = 2;
		break;
	default:
		config->stopbits = -1;
	}

	switch (data->dcb.fRtsControl) {
	case RTS_CONTROL_DISABLE:
		config->rts = SP_RTS_OFF;
		break;
	case RTS_CONTROL_ENABLE:
		config->rts = SP_RTS_ON;
		break;
	case RTS_CONTROL_HANDSHAKE:
		config->rts = SP_RTS_FLOW_CONTROL;
		break;
	default:
		config->rts = -1;
	}

	config->cts = data->dcb.fOutxCtsFlow ? SP_CTS_FLOW_CONTROL : SP_CTS_IGNORE;

	switch (data->dcb.fDtrControl) {
	case DTR_CONTROL_DISABLE:
		config->dtr = SP_DTR_OFF;
		break;
	case DTR_CONTROL_ENABLE:
		config->dtr = SP_DTR_ON;
		break;
	case DTR_CONTROL_HANDSHAKE:
		config->dtr = SP_DTR_FLOW_CONTROL;
		break;
	default:
		config->dtr = -1;
	}

	config->dsr = data->dcb.fOutxDsrFlow ? SP_DSR_FLOW_CONTROL : SP_DSR_IGNORE;

	if (data->dcb.fInX) {
		if (data->dcb.fOutX)
			config->xon_xoff = SP_XONXOFF_INOUT;
		else
			config->xon_xoff = SP_XONXOFF_IN;
	} else {
		if (data->dcb.fOutX)
			config->xon_xoff = SP_XONXOFF_OUT;
		else
			config->xon_xoff = SP_XONXOFF_DISABLED;
	}

#else // !_WIN32

	if (tcgetattr(port->fd, &data->term) < 0)
		RETURN_FAIL("tcgetattr() failed");

	if (ioctl(port->fd, TIOCMGET, &data->controlbits) < 0)
		RETURN_FAIL("TIOCMGET ioctl failed");

#ifdef USE_TERMIOX
	int ret = get_flow(port->fd, data);

	if (ret == SP_ERR_FAIL && errno == EINVAL)
		data->termiox_supported = 0;
	else if (ret < 0)
		RETURN_CODEVAL(ret);
	else
		data->termiox_supported = 1;
#else
	data->termiox_supported = 0;
#endif

	for (i = 0; i < NUM_STD_BAUDRATES; i++) {
		if (cfgetispeed(&data->term) == std_baudrates[i].index) {
			config->baudrate = std_baudrates[i].value;
			break;
		}
	}

	if (i == NUM_STD_BAUDRATES) {
#ifdef __APPLE__
		config->baudrate = (int)data->term.c_ispeed;
#elif defined(USE_TERMIOS_SPEED)
		TRY(get_baudrate(port->fd, &config->baudrate));
#else
		config->baudrate = -1;
#endif
	}

	switch (data->term.c_cflag & CSIZE) {
	case CS8:
		config->bits = 8;
		break;
	case CS7:
		config->bits = 7;
		break;
	case CS6:
		config->bits = 6;
		break;
	case CS5:
		config->bits = 5;
		break;
	default:
		config->bits = -1;
	}

	if (!(data->term.c_cflag & PARENB) && (data->term.c_iflag & IGNPAR))
		config->parity = SP_PARITY_NONE;
	else if (!(data->term.c_cflag & PARENB) || (data->term.c_iflag & IGNPAR))
		config->parity = -1;
#ifdef CMSPAR
	else if (data->term.c_cflag & CMSPAR)
		config->parity = (data->term.c_cflag & PARODD) ? SP_PARITY_MARK : SP_PARITY_SPACE;
#endif
	else
		config->parity = (data->term.c_cflag & PARODD) ? SP_PARITY_ODD : SP_PARITY_EVEN;

	config->stopbits = (data->term.c_cflag & CSTOPB) ? 2 : 1;

	if (data->term.c_cflag & CRTSCTS) {
		config->rts = SP_RTS_FLOW_CONTROL;
		config->cts = SP_CTS_FLOW_CONTROL;
	} else {
		if (data->termiox_supported && data->rts_flow)
			config->rts = SP_RTS_FLOW_CONTROL;
		else
			config->rts = (data->controlbits & TIOCM_RTS) ? SP_RTS_ON : SP_RTS_OFF;

		config->cts = (data->termiox_supported && data->cts_flow) ?
			SP_CTS_FLOW_CONTROL : SP_CTS_IGNORE;
	}

	if (data->termiox_supported && data->dtr_flow)
		config->dtr = SP_DTR_FLOW_CONTROL;
	else
		config->dtr = (data->controlbits & TIOCM_DTR) ? SP_DTR_ON : SP_DTR_OFF;

	config->dsr = (data->termiox_supported && data->dsr_flow) ?
		SP_DSR_FLOW_CONTROL : SP_DSR_IGNORE;

	if (data->term.c_iflag & IXOFF) {
		if (data->term.c_iflag & IXON)
			config->xon_xoff = SP_XONXOFF_INOUT;
		else
			config->xon_xoff = SP_XONXOFF_IN;
	} else {
		if (data->term.c_iflag & IXON)
			config->xon_xoff = SP_XONXOFF_OUT;
		else
			config->xon_xoff = SP_XONXOFF_DISABLED;
	}
#endif

	RETURN_OK();
}

static enum sp_return set_config(struct sp_port *port, struct port_data *data,
	const struct sp_port_config *config)
{
	unsigned int i;
#ifdef __APPLE__
	BAUD_TYPE baud_nonstd;

	baud_nonstd = B0;
#endif
#ifdef USE_TERMIOS_SPEED
	int baud_nonstd = 0;
#endif

	TRACE("%p, %p, %p", port, data, config);

	DEBUG_FMT("Setting configuration for port %s", port->name);

#ifdef _WIN32
	BYTE* new_buf;

	TRY(await_write_completion(port));

	if (config->baudrate >= 0) {
		for (i = 0; i < NUM_STD_BAUDRATES; i++) {
			if (config->baudrate == std_baudrates[i].value) {
				data->dcb.BaudRate = std_baudrates[i].index;
				break;
			}
		}

		if (i == NUM_STD_BAUDRATES)
			data->dcb.BaudRate = config->baudrate;

		/* Allocate write buffer for 50ms of data at baud rate. */
		port->write_buf_size = max(config->baudrate / (8 * 20), 1);
		new_buf = realloc(port->write_buf, port->write_buf_size);
		if (!new_buf)
			RETURN_ERROR(SP_ERR_MEM, "Allocating write buffer failed");
		port->write_buf = new_buf;
	}

	if (config->bits >= 0)
		data->dcb.ByteSize = config->bits;

	if (config->parity >= 0) {
		switch (config->parity) {
		case SP_PARITY_NONE:
			data->dcb.Parity = NOPARITY;
			break;
		case SP_PARITY_ODD:
			data->dcb.Parity = ODDPARITY;
			break;
		case SP_PARITY_EVEN:
			data->dcb.Parity = EVENPARITY;
			break;
		case SP_PARITY_MARK:
			data->dcb.Parity = MARKPARITY;
			break;
		case SP_PARITY_SPACE:
			data->dcb.Parity = SPACEPARITY;
			break;
		default:
			RETURN_ERROR(SP_ERR_ARG, "Invalid parity setting");
		}
	}

	if (config->stopbits >= 0) {
		switch (config->stopbits) {
		/* Note: There's also ONE5STOPBITS == 1.5 (unneeded so far). */
		case 1:
			data->dcb.StopBits = ONESTOPBIT;
			break;
		case 2:
			data->dcb.StopBits = TWOSTOPBITS;
			break;
		default:
			RETURN_ERROR(SP_ERR_ARG, "Invalid stop bit setting");
		}
	}

	if (config->rts >= 0) {
		switch (config->rts) {
		case SP_RTS_OFF:
			data->dcb.fRtsControl = RTS_CONTROL_DISABLE;
			break;
		case SP_RTS_ON:
			data->dcb.fRtsControl = RTS_CONTROL_ENABLE;
			break;
		case SP_RTS_FLOW_CONTROL:
			data->dcb.fRtsControl = RTS_CONTROL_HANDSHAKE;
			break;
		default:
			RETURN_ERROR(SP_ERR_ARG, "Invalid RTS setting");
		}
	}

	if (config->cts >= 0) {
		switch (config->cts) {
		case SP_CTS_IGNORE:
			data->dcb.fOutxCtsFlow = FALSE;
			break;
		case SP_CTS_FLOW_CONTROL:
			data->dcb.fOutxCtsFlow = TRUE;
			break;
		default:
			RETURN_ERROR(SP_ERR_ARG, "Invalid CTS setting");
		}
	}

	if (config->dtr >= 0) {
		switch (config->dtr) {
		case SP_DTR_OFF:
			data->dcb.fDtrControl = DTR_CONTROL_DISABLE;
			break;
		case SP_DTR_ON:
			data->dcb.fDtrControl = DTR_CONTROL_ENABLE;
			break;
		case SP_DTR_FLOW_CONTROL:
			data->dcb.fDtrControl = DTR_CONTROL_HANDSHAKE;
			break;
		default:
			RETURN_ERROR(SP_ERR_ARG, "Invalid DTR setting");
		}
	}

	if (config->dsr >= 0) {
		switch (config->dsr) {
		case SP_DSR_IGNORE:
			data->dcb.fOutxDsrFlow = FALSE;
			break;
		case SP_DSR_FLOW_CONTROL:
			data->dcb.fOutxDsrFlow = TRUE;
			break;
		default:
			RETURN_ERROR(SP_ERR_ARG, "Invalid DSR setting");
		}
	}

	if (config->xon_xoff >= 0) {
		switch (config->xon_xoff) {
		case SP_XONXOFF_DISABLED:
			data->dcb.fInX = FALSE;
			data->dcb.fOutX = FALSE;
			break;
		case SP_XONXOFF_IN:
			data->dcb.fInX = TRUE;
			data->dcb.fOutX = FALSE;
			break;
		case SP_XONXOFF_OUT:
			data->dcb.fInX = FALSE;
			data->dcb.fOutX = TRUE;
			break;
		case SP_XONXOFF_INOUT:
			data->dcb.fInX = TRUE;
			data->dcb.fOutX = TRUE;
			break;
		default:
			RETURN_ERROR(SP_ERR_ARG, "Invalid XON/XOFF setting");
		}
	}

	if (!SetCommState(port->hdl, &data->dcb))
		RETURN_FAIL("SetCommState() failed");

#else /* !_WIN32 */

	int controlbits;

	if (config->baudrate >= 0) {
		for (i = 0; i < NUM_STD_BAUDRATES; i++) {
			if (config->baudrate == std_baudrates[i].value) {
				if (cfsetospeed(&data->term, std_baudrates[i].index) < 0)
					RETURN_FAIL("cfsetospeed() failed");

				if (cfsetispeed(&data->term, std_baudrates[i].index) < 0)
					RETURN_FAIL("cfsetispeed() failed");
				break;
			}
		}

		/* Non-standard baud rate */
		if (i == NUM_STD_BAUDRATES) {
#ifdef __APPLE__
			/* Set "dummy" baud rate. */
			if (cfsetspeed(&data->term, B9600) < 0)
				RETURN_FAIL("cfsetspeed() failed");
			baud_nonstd = config->baudrate;
#elif defined(USE_TERMIOS_SPEED)
			baud_nonstd = 1;
#else
			RETURN_ERROR(SP_ERR_SUPP, "Non-standard baudrate not supported");
#endif
		}
	}

	if (config->bits >= 0) {
		data->term.c_cflag &= ~CSIZE;
		switch (config->bits) {
		case 8:
			data->term.c_cflag |= CS8;
			break;
		case 7:
			data->term.c_cflag |= CS7;
			break;
		case 6:
			data->term.c_cflag |= CS6;
			break;
		case 5:
			data->term.c_cflag |= CS5;
			break;
		default:
			RETURN_ERROR(SP_ERR_ARG, "Invalid data bits setting");
		}
	}

	if (config->parity >= 0) {
		data->term.c_iflag &= ~IGNPAR;
		data->term.c_cflag &= ~(PARENB | PARODD);
#ifdef CMSPAR
		data->term.c_cflag &= ~CMSPAR;
#endif
		switch (config->parity) {
		case SP_PARITY_NONE:
			data->term.c_iflag |= IGNPAR;
			break;
		case SP_PARITY_EVEN:
			data->term.c_cflag |= PARENB;
			break;
		case SP_PARITY_ODD:
			data->term.c_cflag |= PARENB | PARODD;
			break;
#ifdef CMSPAR
		case SP_PARITY_MARK:
			data->term.c_cflag |= PARENB | PARODD;
			data->term.c_cflag |= CMSPAR;
			break;
		case SP_PARITY_SPACE:
			data->term.c_cflag |= PARENB;
			data->term.c_cflag |= CMSPAR;
			break;
#else
		case SP_PARITY_MARK:
		case SP_PARITY_SPACE:
			RETURN_ERROR(SP_ERR_SUPP, "Mark/space parity not supported");
#endif
		default:
			RETURN_ERROR(SP_ERR_ARG, "Invalid parity setting");
		}
	}

	if (config->stopbits >= 0) {
		data->term.c_cflag &= ~CSTOPB;
		switch (config->stopbits) {
		case 1:
			data->term.c_cflag &= ~CSTOPB;
			break;
		case 2:
			data->term.c_cflag |= CSTOPB;
			break;
		default:
			RETURN_ERROR(SP_ERR_ARG, "Invalid stop bits setting");
		}
	}

	if (config->rts >= 0 || config->cts >= 0) {
		if (data->termiox_supported) {
			data->rts_flow = data->cts_flow = 0;
			switch (config->rts) {
			case SP_RTS_OFF:
			case SP_RTS_ON:
				controlbits = TIOCM_RTS;
				if (ioctl(port->fd, config->rts == SP_RTS_ON ? TIOCMBIS : TIOCMBIC, &controlbits) < 0)
					RETURN_FAIL("Setting RTS signal level failed");
				break;
			case SP_RTS_FLOW_CONTROL:
				data->rts_flow = 1;
				break;
			default:
				break;
			}
			if (config->cts == SP_CTS_FLOW_CONTROL)
				data->cts_flow = 1;

			if (data->rts_flow && data->cts_flow)
				data->term.c_iflag |= CRTSCTS;
			else
				data->term.c_iflag &= ~CRTSCTS;
		} else {
			/* Asymmetric use of RTS/CTS not supported. */
			if (data->term.c_iflag & CRTSCTS) {
				/* Flow control can only be disabled for both RTS & CTS together. */
				if (config->rts >= 0 && config->rts != SP_RTS_FLOW_CONTROL) {
					if (config->cts != SP_CTS_IGNORE)
						RETURN_ERROR(SP_ERR_SUPP, "RTS & CTS flow control must be disabled together");
				}
				if (config->cts >= 0 && config->cts != SP_CTS_FLOW_CONTROL) {
					if (config->rts <= 0 || config->rts == SP_RTS_FLOW_CONTROL)
						RETURN_ERROR(SP_ERR_SUPP, "RTS & CTS flow control must be disabled together");
				}
			} else {
				/* Flow control can only be enabled for both RTS & CTS together. */
				if (((config->rts == SP_RTS_FLOW_CONTROL) && (config->cts != SP_CTS_FLOW_CONTROL)) ||
					((config->cts == SP_CTS_FLOW_CONTROL) && (config->rts != SP_RTS_FLOW_CONTROL)))
					RETURN_ERROR(SP_ERR_SUPP, "RTS & CTS flow control must be enabled together");
			}

			if (config->rts >= 0) {
				if (config->rts == SP_RTS_FLOW_CONTROL) {
					data->term.c_iflag |= CRTSCTS;
				} else {
					controlbits = TIOCM_RTS;
					if (ioctl(port->fd, config->rts == SP_RTS_ON ? TIOCMBIS : TIOCMBIC,
							&controlbits) < 0)
						RETURN_FAIL("Setting RTS signal level failed");
				}
			}
		}
	}

	if (config->dtr >= 0 || config->dsr >= 0) {
		if (data->termiox_supported) {
			data->dtr_flow = data->dsr_flow = 0;
			switch (config->dtr) {
			case SP_DTR_OFF:
			case SP_DTR_ON:
				controlbits = TIOCM_DTR;
				if (ioctl(port->fd, config->dtr == SP_DTR_ON ? TIOCMBIS : TIOCMBIC, &controlbits) < 0)
					RETURN_FAIL("Setting DTR signal level failed");
				break;
			case SP_DTR_FLOW_CONTROL:
				data->dtr_flow = 1;
				break;
			default:
				break;
			}
			if (config->dsr == SP_DSR_FLOW_CONTROL)
				data->dsr_flow = 1;
		} else {
			/* DTR/DSR flow control not supported. */
			if (config->dtr == SP_DTR_FLOW_CONTROL || config->dsr == SP_DSR_FLOW_CONTROL)
				RETURN_ERROR(SP_ERR_SUPP, "DTR/DSR flow control not supported");

			if (config->dtr >= 0) {
				controlbits = TIOCM_DTR;
				if (ioctl(port->fd, config->dtr == SP_DTR_ON ? TIOCMBIS : TIOCMBIC,
						&controlbits) < 0)
					RETURN_FAIL("Setting DTR signal level failed");
			}
		}
	}

	if (config->xon_xoff >= 0) {
		data->term.c_iflag &= ~(IXON | IXOFF | IXANY);
		switch (config->xon_xoff) {
		case SP_XONXOFF_DISABLED:
			break;
		case SP_XONXOFF_IN:
			data->term.c_iflag |= IXOFF;
			break;
		case SP_XONXOFF_OUT:
			data->term.c_iflag |= IXON | IXANY;
			break;
		case SP_XONXOFF_INOUT:
			data->term.c_iflag |= IXON | IXOFF | IXANY;
			break;
		default:
			RETURN_ERROR(SP_ERR_ARG, "Invalid XON/XOFF setting");
		}
	}

	if (tcsetattr(port->fd, TCSANOW, &data->term) < 0)
		RETURN_FAIL("tcsetattr() failed");

#ifdef __APPLE__
	if (baud_nonstd != B0) {
		if (ioctl(port->fd, IOSSIOSPEED, &baud_nonstd) == -1)
			RETURN_FAIL("IOSSIOSPEED ioctl failed");
		/*
		 * Set baud rates in data->term to correct, but incompatible
		 * with tcsetattr() value, same as delivered by tcgetattr().
		 */
		if (cfsetspeed(&data->term, baud_nonstd) < 0)
			RETURN_FAIL("cfsetspeed() failed");
	}
#elif defined(__linux__)
#ifdef USE_TERMIOS_SPEED
	if (baud_nonstd)
		TRY(set_baudrate(port->fd, config->baudrate));
#endif
#ifdef USE_TERMIOX
	if (data->termiox_supported)
		TRY(set_flow(port->fd, data));
#endif
#endif

#endif /* !_WIN32 */

	RETURN_OK();
}

SP_API enum sp_return sp_new_config(struct sp_port_config **config_ptr)
{
	struct sp_port_config *config;

	TRACE("%p", config_ptr);

	if (!config_ptr)
		RETURN_ERROR(SP_ERR_ARG, "Null result pointer");

	*config_ptr = NULL;

	if (!(config = malloc(sizeof(struct sp_port_config))))
		RETURN_ERROR(SP_ERR_MEM, "Config malloc failed");

	config->baudrate = -1;
	config->bits = -1;
	config->parity = -1;
	config->stopbits = -1;
	config->rts = -1;
	config->cts = -1;
	config->dtr = -1;
	config->dsr = -1;
	config->xon_xoff = -1;

	*config_ptr = config;

	RETURN_OK();
}

SP_API void sp_free_config(struct sp_port_config *config)
{
	TRACE("%p", config);

	if (!config)
		DEBUG("Null config");
	else
		free(config);

	RETURN();
}

SP_API enum sp_return sp_get_config(struct sp_port *port,
                                    struct sp_port_config *config)
{
	struct port_data data;

	TRACE("%p, %p", port, config);

	CHECK_OPEN_PORT();

	if (!config)
		RETURN_ERROR(SP_ERR_ARG, "Null config");

	TRY(get_config(port, &data, config));

	RETURN_OK();
}

SP_API enum sp_return sp_set_config(struct sp_port *port,
                                    const struct sp_port_config *config)
{
	struct port_data data;
	struct sp_port_config prev_config;

	TRACE("%p, %p", port, config);

	CHECK_OPEN_PORT();

	if (!config)
		RETURN_ERROR(SP_ERR_ARG, "Null config");

	TRY(get_config(port, &data, &prev_config));
	TRY(set_config(port, &data, config));

	RETURN_OK();
}

#define CREATE_ACCESSORS(x, type) \
SP_API enum sp_return sp_set_##x(struct sp_port *port, type x) { \
	struct port_data data; \
	struct sp_port_config config; \
	TRACE("%p, %d", port, x); \
	CHECK_OPEN_PORT(); \
	TRY(get_config(port, &data, &config)); \
	config.x = x; \
	TRY(set_config(port, &data, &config)); \
	RETURN_OK(); \
} \
SP_API enum sp_return sp_get_config_##x(const struct sp_port_config *config, \
                                        type *x) { \
	TRACE("%p, %p", config, x); \
	if (!x) \
		RETURN_ERROR(SP_ERR_ARG, "Null result pointer"); \
	if (!config) \
		RETURN_ERROR(SP_ERR_ARG, "Null config"); \
	*x = config->x; \
	RETURN_OK(); \
} \
SP_API enum sp_return sp_set_config_##x(struct sp_port_config *config, \
                                        type x) { \
	TRACE("%p, %d", config, x); \
	if (!config) \
		RETURN_ERROR(SP_ERR_ARG, "Null config"); \
	config->x = x; \
	RETURN_OK(); \
}

CREATE_ACCESSORS(baudrate, int)
CREATE_ACCESSORS(bits, int)
CREATE_ACCESSORS(parity, enum sp_parity)
CREATE_ACCESSORS(stopbits, int)
CREATE_ACCESSORS(rts, enum sp_rts)
CREATE_ACCESSORS(cts, enum sp_cts)
CREATE_ACCESSORS(dtr, enum sp_dtr)
CREATE_ACCESSORS(dsr, enum sp_dsr)
CREATE_ACCESSORS(xon_xoff, enum sp_xonxoff)

SP_API enum sp_return sp_set_config_flowcontrol(struct sp_port_config *config,
                                                enum sp_flowcontrol flowcontrol)
{
	if (!config)
		RETURN_ERROR(SP_ERR_ARG, "Null configuration");

	if (flowcontrol > SP_FLOWCONTROL_DTRDSR)
		RETURN_ERROR(SP_ERR_ARG, "Invalid flow control setting");

	if (flowcontrol == SP_FLOWCONTROL_XONXOFF)
		config->xon_xoff = SP_XONXOFF_INOUT;
	else
		config->xon_xoff = SP_XONXOFF_DISABLED;

	if (flowcontrol == SP_FLOWCONTROL_RTSCTS) {
		config->rts = SP_RTS_FLOW_CONTROL;
		config->cts = SP_CTS_FLOW_CONTROL;
	} else {
		if (config->rts == SP_RTS_FLOW_CONTROL)
			config->rts = SP_RTS_ON;
		config->cts = SP_CTS_IGNORE;
	}

	if (flowcontrol == SP_FLOWCONTROL_DTRDSR) {
		config->dtr = SP_DTR_FLOW_CONTROL;
		config->dsr = SP_DSR_FLOW_CONTROL;
	} else {
		if (config->dtr == SP_DTR_FLOW_CONTROL)
			config->dtr = SP_DTR_ON;
		config->dsr = SP_DSR_IGNORE;
	}

	RETURN_OK();
}

SP_API enum sp_return sp_set_flowcontrol(struct sp_port *port,
                                         enum sp_flowcontrol flowcontrol)
{
	struct port_data data;
	struct sp_port_config config;

	TRACE("%p, %d", port, flowcontrol);

	CHECK_OPEN_PORT();

	TRY(get_config(port, &data, &config));

	TRY(sp_set_config_flowcontrol(&config, flowcontrol));

	TRY(set_config(port, &data, &config));

	RETURN_OK();
}

SP_API enum sp_return sp_get_signals(struct sp_port *port,
                                     enum sp_signal *signals)
{
	TRACE("%p, %p", port, signals);

	CHECK_OPEN_PORT();

	if (!signals)
		RETURN_ERROR(SP_ERR_ARG, "Null result pointer");

	DEBUG_FMT("Getting control signals for port %s", port->name);

	*signals = 0;
#ifdef _WIN32
	DWORD bits;
	if (GetCommModemStatus(port->hdl, &bits) == 0)
		RETURN_FAIL("GetCommModemStatus() failed");
	if (bits & MS_CTS_ON)
		*signals |= SP_SIG_CTS;
	if (bits & MS_DSR_ON)
		*signals |= SP_SIG_DSR;
	if (bits & MS_RLSD_ON)
		*signals |= SP_SIG_DCD;
	if (bits & MS_RING_ON)
		*signals |= SP_SIG_RI;
#else
	int bits;
	if (ioctl(port->fd, TIOCMGET, &bits) < 0)
		RETURN_FAIL("TIOCMGET ioctl failed");
	if (bits & TIOCM_CTS)
		*signals |= SP_SIG_CTS;
	if (bits & TIOCM_DSR)
		*signals |= SP_SIG_DSR;
	if (bits & TIOCM_CAR)
		*signals |= SP_SIG_DCD;
	if (bits & TIOCM_RNG)
		*signals |= SP_SIG_RI;
#endif
	RETURN_OK();
}

SP_API enum sp_return sp_start_break(struct sp_port *port)
{
	TRACE("%p", port);

	CHECK_OPEN_PORT();
#ifdef _WIN32
	if (SetCommBreak(port->hdl) == 0)
		RETURN_FAIL("SetCommBreak() failed");
#else
	if (ioctl(port->fd, TIOCSBRK, 1) < 0)
		RETURN_FAIL("TIOCSBRK ioctl failed");
#endif

	RETURN_OK();
}

SP_API enum sp_return sp_end_break(struct sp_port *port)
{
	TRACE("%p", port);

	CHECK_OPEN_PORT();
#ifdef _WIN32
	if (ClearCommBreak(port->hdl) == 0)
		RETURN_FAIL("ClearCommBreak() failed");
#else
	if (ioctl(port->fd, TIOCCBRK, 1) < 0)
		RETURN_FAIL("TIOCCBRK ioctl failed");
#endif

	RETURN_OK();
}

SP_API int sp_last_error_code(void)
{
	TRACE_VOID();
#ifdef _WIN32
	RETURN_INT(GetLastError());
#else
	RETURN_INT(errno);
#endif
}

SP_API char *sp_last_error_message(void)
{
	TRACE_VOID();

#ifdef _WIN32
	char *message;
	DWORD error = GetLastError();

	DWORD length = FormatMessageA(
		FORMAT_MESSAGE_ALLOCATE_BUFFER |
		FORMAT_MESSAGE_FROM_SYSTEM |
		FORMAT_MESSAGE_IGNORE_INSERTS,
		NULL,
		error,
		MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
		(LPSTR) &message,
		0, NULL );

	if (length >= 2 && message[length - 2] == '\r')
		message[length - 2] = '\0';

	RETURN_STRING(message);
#else
	RETURN_STRING(strerror(errno));
#endif
}

SP_API void sp_free_error_message(char *message)
{
	TRACE("%s", message);

#ifdef _WIN32
	LocalFree(message);
#else
	(void)message;
#endif

	RETURN();
}

SP_API void sp_set_debug_handler(void (*handler)(const char *format, ...))
{
	TRACE("%p", handler);

	sp_debug_handler = handler;

	RETURN();
}

SP_API void sp_default_debug_handler(const char *format, ...)
{
	va_list args;
	va_start(args, format);
	if (getenv("LIBSERIALPORT_DEBUG")) {
		fputs("sp: ", stderr);
		vfprintf(stderr, format, args);
	}
	va_end(args);
}

SP_API int sp_get_major_package_version(void)
{
	return SP_PACKAGE_VERSION_MAJOR;
}

SP_API int sp_get_minor_package_version(void)
{
	return SP_PACKAGE_VERSION_MINOR;
}

SP_API int sp_get_micro_package_version(void)
{
	return SP_PACKAGE_VERSION_MICRO;
}

SP_API const char *sp_get_package_version_string(void)
{
	return SP_PACKAGE_VERSION_STRING;
}

SP_API int sp_get_current_lib_version(void)
{
	return SP_LIB_VERSION_CURRENT;
}

SP_API int sp_get_revision_lib_version(void)
{
	return SP_LIB_VERSION_REVISION;
}

SP_API int sp_get_age_lib_version(void)
{
	return SP_LIB_VERSION_AGE;
}

SP_API const char *sp_get_lib_version_string(void)
{
	return SP_LIB_VERSION_STRING;
}

/** @} */

/*** End of inlined file: serialport.c ***/


/*** Start of inlined file: timing.c ***/
SP_PRIV void time_get(struct time *time)
{
#ifdef _WIN32
	LARGE_INTEGER count;
	QueryPerformanceCounter(&count);
	time->ticks = count.QuadPart;
#elif defined(HAVE_CLOCK_GETTIME)
	struct timespec ts;
	if (clock_gettime(CLOCK_MONOTONIC, &ts) == -1)
		clock_gettime(CLOCK_REALTIME, &ts);
	time->tv.tv_sec = ts.tv_sec;
	time->tv.tv_usec = ts.tv_nsec / 1000;
#elif defined(__APPLE__)
	mach_timebase_info_data_t info;
	mach_timebase_info(&info);
	uint64_t ticks = mach_absolute_time();
	uint64_t ns = (ticks * info.numer) / info.denom;
	time->tv.tv_sec = ns / 1000000000;
	time->tv.tv_usec = (ns % 1000000000) / 1000;
#else
	gettimeofday(&time->tv, NULL);
#endif
}

SP_PRIV void time_set_ms(struct time *time, unsigned int ms)
{
#ifdef _WIN32
	LARGE_INTEGER frequency;
	QueryPerformanceFrequency(&frequency);
	time->ticks = ms * (frequency.QuadPart / 1000);
#else
	time->tv.tv_sec = ms / 1000;
	time->tv.tv_usec = (ms % 1000) * 1000;
#endif
}

SP_PRIV void time_add(const struct time *a,
		const struct time *b, struct time *result)
{
#ifdef _WIN32
	result->ticks = a->ticks + b->ticks;
#else
	timeradd(&a->tv, &b->tv, &result->tv);
#endif
}

SP_PRIV void time_sub(const struct time *a,
		const struct time *b, struct time *result)
{
#ifdef _WIN32
	result->ticks = a->ticks - b->ticks;
#else
	timersub(&a->tv, &b->tv, &result->tv);
#endif
}

SP_PRIV bool time_greater(const struct time *a, const struct time *b)
{
#ifdef _WIN32
	return (a->ticks > b->ticks);
#else
	return timercmp(&a->tv, &b->tv, >);
#endif
}

SP_PRIV void time_as_timeval(const struct time *time, struct timeval *tv)
{
#ifdef _WIN32
	LARGE_INTEGER frequency;
	QueryPerformanceFrequency(&frequency);
	tv->tv_sec = (long) (time->ticks / frequency.QuadPart);
	tv->tv_usec = (long) ((time->ticks % frequency.QuadPart) /
		(frequency.QuadPart / 1000000));
#else
	*tv = time->tv;
#endif
}

SP_PRIV unsigned int time_as_ms(const struct time *time)
{
#ifdef _WIN32
	LARGE_INTEGER frequency;
	QueryPerformanceFrequency(&frequency);
	return (unsigned int) (time->ticks / (frequency.QuadPart / 1000));
#else
	return time->tv.tv_sec * 1000 + time->tv.tv_usec / 1000;
#endif
}

SP_PRIV void timeout_start(struct timeout *timeout, unsigned int timeout_ms)
{
	timeout->ms = timeout_ms;

	/* Get time at start of operation. */
	time_get(&timeout->start);
	/* Define duration of timeout. */
	time_set_ms(&timeout->delta, timeout_ms);
	/* Calculate time at which we should give up. */
	time_add(&timeout->start, &timeout->delta, &timeout->end);
	/* Disable limit unless timeout_limit() called. */
	timeout->limit_ms = 0;
	/* First blocking call has not yet been made. */
	timeout->calls_started = false;
}

SP_PRIV void timeout_limit(struct timeout *timeout, unsigned int limit_ms)
{
	timeout->limit_ms = limit_ms;
	timeout->overflow = (timeout->ms > timeout->limit_ms);
	time_set_ms(&timeout->delta_max, timeout->limit_ms);
}

SP_PRIV bool timeout_check(struct timeout *timeout)
{
	if (!timeout->calls_started)
		return false;

	if (timeout->ms == 0)
		return false;

	time_get(&timeout->now);
	time_sub(&timeout->end, &timeout->now, &timeout->delta);
	if (timeout->limit_ms)
		if ((timeout->overflow = time_greater(&timeout->delta, &timeout->delta_max)))
			timeout->delta = timeout->delta_max;

	return time_greater(&timeout->now, &timeout->end);
}

SP_PRIV void timeout_update(struct timeout *timeout)
{
	timeout->calls_started = true;
}

#ifndef _WIN32
SP_PRIV struct timeval *timeout_timeval(struct timeout *timeout)
{
	if (timeout->ms == 0)
		return NULL;

	time_as_timeval(&timeout->delta, &timeout->delta_tv);

	return &timeout->delta_tv;
}
#endif

SP_PRIV unsigned int timeout_remaining_ms(struct timeout *timeout)
{
	if (timeout->limit_ms && timeout->overflow)
		return timeout->limit_ms;
	else
		return time_as_ms(&timeout->delta);
}

/*** End of inlined file: timing.c ***/

#if defined(_MSC_VER)


/*** Start of inlined file: windows.c ***/
#pragma comment(lib, "Setupapi.lib")
/* USB path is a string of at most 8 decimal numbers < 128 separated by dots. */
#define MAX_USB_PATH ((8 * 3) + (7 * 1) + 1)

static void enumerate_hub(struct sp_port *port, const char *hub_name,
                          const char *parent_path, DEVINST dev_inst);

static char *wc_to_utf8(PWCHAR wc_buffer, ULONG wc_bytes)
{
	ULONG wc_length = wc_bytes / sizeof(WCHAR);
	ULONG utf8_bytes;
	WCHAR *wc_str = NULL;
	char *utf8_str = NULL;

	/* Allocate aligned wide char buffer */
	if (!(wc_str = malloc((wc_length + 1) * sizeof(WCHAR))))
		goto wc_to_utf8_end;

	/* Zero-terminate the wide char string. */
	memcpy(wc_str, wc_buffer, wc_bytes);
	wc_str[wc_length] = 0;

	/* Compute the size of the UTF-8 converted string. */
	if (!(utf8_bytes = WideCharToMultiByte(CP_ACP, WC_NO_BEST_FIT_CHARS, wc_str, -1,
	                                 NULL, 0, NULL, NULL)))
		goto wc_to_utf8_end;

	/* Allocate UTF-8 output buffer. */
	if (!(utf8_str = malloc(utf8_bytes)))
		goto wc_to_utf8_end;

	/* Actually converted to UTF-8. */
	if (!WideCharToMultiByte(CP_ACP, WC_NO_BEST_FIT_CHARS, wc_str, -1,
	                         utf8_str, utf8_bytes, NULL, NULL)) {
		free(utf8_str);
		utf8_str = NULL;
		goto wc_to_utf8_end;
	}

wc_to_utf8_end:
	if (wc_str)
		free(wc_str);

	return utf8_str;
}

static char *get_root_hub_name(HANDLE host_controller)
{
	USB_ROOT_HUB_NAME root_hub_name;
	PUSB_ROOT_HUB_NAME root_hub_name_wc;
	char *root_hub_name_utf8;
	ULONG size = 0;

	/* Compute the size of the root hub name string. */
	if (!DeviceIoControl(host_controller, IOCTL_USB_GET_ROOT_HUB_NAME, 0, 0,
	                     &root_hub_name, sizeof(root_hub_name), &size, NULL))
		return NULL;

	/* Allocate wide char root hub name string. */
	size = root_hub_name.ActualLength;
	if (!(root_hub_name_wc = malloc(size)))
		return NULL;

	/* Actually get the root hub name string. */
	if (!DeviceIoControl(host_controller, IOCTL_USB_GET_ROOT_HUB_NAME,
	                     NULL, 0, root_hub_name_wc, size, &size, NULL)) {
		free(root_hub_name_wc);
		return NULL;
	}

	/* Convert the root hub name string to UTF-8. */
	root_hub_name_utf8 = wc_to_utf8(root_hub_name_wc->RootHubName, size - offsetof(USB_ROOT_HUB_NAME, RootHubName));
	free(root_hub_name_wc);
	return root_hub_name_utf8;
}

static char *get_external_hub_name(HANDLE hub, ULONG connection_index)
{
	USB_NODE_CONNECTION_NAME ext_hub_name;
	PUSB_NODE_CONNECTION_NAME ext_hub_name_wc;
	char *ext_hub_name_utf8;
	ULONG size;

	/* Compute the size of the external hub name string. */
	ext_hub_name.ConnectionIndex = connection_index;
	if (!DeviceIoControl(hub, IOCTL_USB_GET_NODE_CONNECTION_NAME,
	                     &ext_hub_name, sizeof(ext_hub_name),
	                     &ext_hub_name, sizeof(ext_hub_name), &size, NULL))
		return NULL;

	/* Allocate wide char external hub name string. */
	size = ext_hub_name.ActualLength;
	if (size <= sizeof(ext_hub_name)
	    || !(ext_hub_name_wc = malloc(size)))
		return NULL;

	/* Get the name of the external hub attached to the specified port. */
	ext_hub_name_wc->ConnectionIndex = connection_index;
	if (!DeviceIoControl(hub, IOCTL_USB_GET_NODE_CONNECTION_NAME,
	                     ext_hub_name_wc, size,
	                     ext_hub_name_wc, size, &size, NULL)) {
		free(ext_hub_name_wc);
		return NULL;
	}

	/* Convert the external hub name string to UTF-8. */
	ext_hub_name_utf8 = wc_to_utf8(ext_hub_name_wc->NodeName, size - offsetof(USB_NODE_CONNECTION_NAME, NodeName));
	free(ext_hub_name_wc);
	return ext_hub_name_utf8;
}

static char *get_string_descriptor(HANDLE hub_device, ULONG connection_index,
                                   UCHAR descriptor_index)
{
	char desc_req_buf[sizeof(USB_DESCRIPTOR_REQUEST) +
	                  MAXIMUM_USB_STRING_LENGTH] = { 0 };
	PUSB_DESCRIPTOR_REQUEST desc_req = (void *)desc_req_buf;
	PUSB_STRING_DESCRIPTOR desc = (void *)(desc_req + 1);
	ULONG size = sizeof(desc_req_buf);

	desc_req->ConnectionIndex = connection_index;
	desc_req->SetupPacket.wValue = (USB_STRING_DESCRIPTOR_TYPE << 8)
	                               | descriptor_index;
	desc_req->SetupPacket.wIndex = 0;
	desc_req->SetupPacket.wLength = (USHORT) (size - sizeof(*desc_req));

	if (!DeviceIoControl(hub_device,
	                     IOCTL_USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION,
	                     desc_req, size, desc_req, size, &size, NULL)
	    || size < 2
	    || desc->bDescriptorType != USB_STRING_DESCRIPTOR_TYPE
	    || desc->bLength != size - sizeof(*desc_req)
	    || desc->bLength % 2)
		return NULL;

	return wc_to_utf8(desc->bString, desc->bLength - offsetof(USB_STRING_DESCRIPTOR, bString));
}

static void enumerate_hub_ports(struct sp_port *port, HANDLE hub_device,
                                ULONG nb_ports, const char *parent_path, DEVINST dev_inst)
{
	char path[MAX_USB_PATH];
	ULONG index = 0;

	for (index = 1; index <= nb_ports; index++) {
		PUSB_NODE_CONNECTION_INFORMATION_EX connection_info_ex;
		ULONG size = sizeof(*connection_info_ex) + (30 * sizeof(USB_PIPE_INFO));

		if (!(connection_info_ex = malloc(size)))
			break;

		connection_info_ex->ConnectionIndex = index;
		if (!DeviceIoControl(hub_device,
		                     IOCTL_USB_GET_NODE_CONNECTION_INFORMATION_EX,
		                     connection_info_ex, size,
		                     connection_info_ex, size, &size, NULL)) {
			/*
			 * Try to get CONNECTION_INFORMATION if
			 * CONNECTION_INFORMATION_EX did not work.
			 */
			PUSB_NODE_CONNECTION_INFORMATION connection_info;

			size = sizeof(*connection_info) + (30 * sizeof(USB_PIPE_INFO));
			if (!(connection_info = malloc(size))) {
				free(connection_info_ex);
				continue;
			}
			connection_info->ConnectionIndex = index;
			if (!DeviceIoControl(hub_device,
			                     IOCTL_USB_GET_NODE_CONNECTION_INFORMATION,
			                     connection_info, size,
			                     connection_info, size, &size, NULL)) {
				free(connection_info);
				free(connection_info_ex);
				continue;
			}

			connection_info_ex->ConnectionIndex = connection_info->ConnectionIndex;
			connection_info_ex->DeviceDescriptor = connection_info->DeviceDescriptor;
			connection_info_ex->DeviceIsHub = connection_info->DeviceIsHub;
			connection_info_ex->DeviceAddress = connection_info->DeviceAddress;
			free(connection_info);
		}

		if (connection_info_ex->DeviceIsHub) {
			/* Recursively enumerate external hub. */
			PCHAR ext_hub_name;
			if ((ext_hub_name = get_external_hub_name(hub_device, index))) {
				snprintf(path, sizeof(path), "%s%ld.",
				         parent_path, connection_info_ex->ConnectionIndex);
				enumerate_hub(port, ext_hub_name, path, dev_inst);
			}
			free(connection_info_ex);
		} else {
			snprintf(path, sizeof(path), "%s%ld",
			         parent_path, connection_info_ex->ConnectionIndex);

			/* Check if this device is the one we search for. */
			if (strcmp(path, port->usb_path)) {
				free(connection_info_ex);
				continue;
			}

			/* Finally grab detailed information regarding the device. */
			port->usb_address = connection_info_ex->DeviceAddress + 1;
			port->usb_vid = connection_info_ex->DeviceDescriptor.idVendor;
			port->usb_pid = connection_info_ex->DeviceDescriptor.idProduct;

			if (connection_info_ex->DeviceDescriptor.iManufacturer)
				port->usb_manufacturer = get_string_descriptor(hub_device, index,
				           connection_info_ex->DeviceDescriptor.iManufacturer);
			if (connection_info_ex->DeviceDescriptor.iProduct)
				port->usb_product = get_string_descriptor(hub_device, index,
				           connection_info_ex->DeviceDescriptor.iProduct);
			if (connection_info_ex->DeviceDescriptor.iSerialNumber) {
				port->usb_serial = get_string_descriptor(hub_device, index,
				           connection_info_ex->DeviceDescriptor.iSerialNumber);
				if (port->usb_serial == NULL) {
					//composite device, get the parent's serial number
					char device_id[MAX_DEVICE_ID_LEN];
					if (CM_Get_Parent(&dev_inst, dev_inst, 0) == CR_SUCCESS) {
						if (CM_Get_Device_IDA(dev_inst, device_id, sizeof(device_id), 0) == CR_SUCCESS)
							port->usb_serial = strdup(strrchr(device_id, '\\')+1);
					}
				}
			}

			free(connection_info_ex);
			break;
		}
	}
}

static void enumerate_hub(struct sp_port *port, const char *hub_name,
                          const char *parent_path, DEVINST dev_inst)
{
	USB_NODE_INFORMATION hub_info;
	HANDLE hub_device;
	ULONG size = sizeof(hub_info);
	char *device_name;

	/* Open the hub with its full name. */
	if (!(device_name = malloc(strlen("\\\\.\\") + strlen(hub_name) + 1)))
		return;
	strcpy(device_name, "\\\\.\\");
	strcat(device_name, hub_name);
	hub_device = CreateFileA(device_name, GENERIC_WRITE, FILE_SHARE_WRITE,
	                         NULL, OPEN_EXISTING, 0, NULL);
	free(device_name);
	if (hub_device == INVALID_HANDLE_VALUE)
		return;

	/* Get the number of ports of the hub. */
	if (DeviceIoControl(hub_device, IOCTL_USB_GET_NODE_INFORMATION,
	                    &hub_info, size, &hub_info, size, &size, NULL))
		/* Enumerate the ports of the hub. */
		enumerate_hub_ports(port, hub_device,
		   hub_info.u.HubInformation.HubDescriptor.bNumberOfPorts, parent_path, dev_inst);

	CloseHandle(hub_device);
}

static void enumerate_host_controller(struct sp_port *port,
                                      HANDLE host_controller_device,
                                      DEVINST dev_inst)
{
	char *root_hub_name;

	if ((root_hub_name = get_root_hub_name(host_controller_device))) {
		enumerate_hub(port, root_hub_name, "", dev_inst);
		free(root_hub_name);
	}
}

static void get_usb_details(struct sp_port *port, DEVINST dev_inst_match)
{
	HDEVINFO device_info;
	SP_DEVINFO_DATA device_info_data;
	ULONG i, size = 0;

	device_info = SetupDiGetClassDevs(&GUID_CLASS_USB_HOST_CONTROLLER, NULL, NULL,
	                                  DIGCF_PRESENT | DIGCF_DEVICEINTERFACE);
	device_info_data.cbSize = sizeof(device_info_data);

	for (i = 0; SetupDiEnumDeviceInfo(device_info, i, &device_info_data); i++) {
		SP_DEVICE_INTERFACE_DATA device_interface_data;
		PSP_DEVICE_INTERFACE_DETAIL_DATA device_detail_data;
		DEVINST dev_inst = dev_inst_match;
		HANDLE host_controller_device;

		device_interface_data.cbSize = sizeof(device_interface_data);
		if (!SetupDiEnumDeviceInterfaces(device_info, 0,
		                                 &GUID_CLASS_USB_HOST_CONTROLLER,
		                                 i, &device_interface_data))
			continue;

		if (!SetupDiGetDeviceInterfaceDetail(device_info,&device_interface_data,
		                                     NULL, 0, &size, NULL)
		    && GetLastError() != ERROR_INSUFFICIENT_BUFFER)
			continue;

		if (!(device_detail_data = malloc(size)))
			continue;
		device_detail_data->cbSize = sizeof(*device_detail_data);
		if (!SetupDiGetDeviceInterfaceDetail(device_info,&device_interface_data,
		                                     device_detail_data, size, &size,
		                                     NULL)) {
			free(device_detail_data);
			continue;
		}

		while (CM_Get_Parent(&dev_inst, dev_inst, 0) == CR_SUCCESS
		       && dev_inst != device_info_data.DevInst) { }
		if (dev_inst != device_info_data.DevInst) {
			free(device_detail_data);
			continue;
		}

		port->usb_bus = i + 1;

		host_controller_device = CreateFile(device_detail_data->DevicePath,
		                                    GENERIC_WRITE, FILE_SHARE_WRITE,
		                                    NULL, OPEN_EXISTING, 0, NULL);
		if (host_controller_device != INVALID_HANDLE_VALUE) {
			enumerate_host_controller(port, host_controller_device, dev_inst_match);
			CloseHandle(host_controller_device);
		}
		free(device_detail_data);
	}

	SetupDiDestroyDeviceInfoList(device_info);
	return;
}

SP_PRIV enum sp_return get_port_details(struct sp_port *port)
{
	/*
	 * Description limited to 127 char, anything longer
	 * would not be user friendly anyway.
	 */
	char description[128];
	SP_DEVINFO_DATA device_info_data = { .cbSize = sizeof(device_info_data) };
	HDEVINFO device_info;
	int i;

	device_info = SetupDiGetClassDevs(NULL, 0, 0,
	                                  DIGCF_PRESENT | DIGCF_ALLCLASSES);
	if (device_info == INVALID_HANDLE_VALUE)
		RETURN_FAIL("SetupDiGetClassDevs() failed");

	for (i = 0; SetupDiEnumDeviceInfo(device_info, i, &device_info_data); i++) {
		HKEY device_key;
		DEVINST dev_inst;
		char value[8], class[16];
		DWORD size, type;
		CONFIGRET cr;

		/* Check if this is the device we are looking for. */
		device_key = SetupDiOpenDevRegKey(device_info, &device_info_data,
		                                  DICS_FLAG_GLOBAL, 0,
		                                  DIREG_DEV, KEY_QUERY_VALUE);
		if (device_key == INVALID_HANDLE_VALUE)
			continue;
		size = sizeof(value);
		if (RegQueryValueExA(device_key, "PortName", NULL, &type, (LPBYTE)value,
		                     &size) != ERROR_SUCCESS || type != REG_SZ) {
			RegCloseKey(device_key);
			continue;
		}
		RegCloseKey(device_key);
		value[sizeof(value) - 1] = 0;
		if (strcmp(value, port->name))
			continue;

		/* Check port transport type. */
		dev_inst = device_info_data.DevInst;
		size = sizeof(class);
		cr = CR_FAILURE;
		while (CM_Get_Parent(&dev_inst, dev_inst, 0) == CR_SUCCESS &&
		       (cr = CM_Get_DevNode_Registry_PropertyA(dev_inst,
		                 CM_DRP_CLASS, 0, class, &size, 0)) != CR_SUCCESS) { }
		if (cr == CR_SUCCESS) {
			if (!strcmp(class, "USB"))
				port->transport = SP_TRANSPORT_USB;
		}

		/* Get port description (friendly name). */
		dev_inst = device_info_data.DevInst;
		size = sizeof(description);
		while ((cr = CM_Get_DevNode_Registry_PropertyA(dev_inst,
		          CM_DRP_FRIENDLYNAME, 0, description, &size, 0)) != CR_SUCCESS
		       && CM_Get_Parent(&dev_inst, dev_inst, 0) == CR_SUCCESS) { }
		if (cr == CR_SUCCESS)
			port->description = strdup(description);

		/* Get more informations for USB connected ports. */
		if (port->transport == SP_TRANSPORT_USB) {
			char usb_path[MAX_USB_PATH] = "", tmp[MAX_USB_PATH];
			char device_id[MAX_DEVICE_ID_LEN];

			/* Recurse over parents to build the USB device path. */
			dev_inst = device_info_data.DevInst;
			do {
				/* Verify that this layer of the tree is USB related. */
				if (CM_Get_Device_IDA(dev_inst, device_id,
				                      sizeof(device_id), 0) != CR_SUCCESS
				    || strncmp(device_id, "USB\\", 4))
					continue;

				/* Discard one layer for composite devices. */
				char compat_ids[512], *p = compat_ids;
				size = sizeof(compat_ids);
				if (CM_Get_DevNode_Registry_PropertyA(dev_inst,
				                                      CM_DRP_COMPATIBLEIDS, 0,
				                                      &compat_ids,
				                                      &size, 0) == CR_SUCCESS) {
					while (*p) {
						if (!strncmp(p, "USB\\COMPOSITE", 13))
							break;
						p += strlen(p) + 1;
					}
					if (*p)
						continue;
				}

				/* Stop the recursion when reaching the USB root. */
				if (!strncmp(device_id, "USB\\ROOT", 8))
					break;

				/* Prepend the address of current USB layer to the USB path. */
				DWORD address;
				size = sizeof(address);
				if (CM_Get_DevNode_Registry_PropertyA(dev_inst, CM_DRP_ADDRESS,
				                        0, &address, &size, 0) == CR_SUCCESS) {
					strcpy(tmp, usb_path);
					snprintf(usb_path, sizeof(usb_path), "%d%s%s",
					         (int)address, *tmp ? "." : "", tmp);
				}
			} while (CM_Get_Parent(&dev_inst, dev_inst, 0) == CR_SUCCESS);

			port->usb_path = strdup(usb_path);

			/* Wake up the USB device to be able to read string descriptor. */
			char *escaped_port_name;
			HANDLE handle;
			if (!(escaped_port_name = malloc(strlen(port->name) + 5)))
				RETURN_ERROR(SP_ERR_MEM, "Escaped port name malloc failed");
			sprintf(escaped_port_name, "\\\\.\\%s", port->name);
			handle = CreateFileA(escaped_port_name, GENERIC_READ, 0, 0,
			                     OPEN_EXISTING,
			                     FILE_ATTRIBUTE_NORMAL|FILE_FLAG_OVERLAPPED, 0);
			free(escaped_port_name);
			CloseHandle(handle);

			/* Retrieve USB device details from the device descriptor. */
			get_usb_details(port, device_info_data.DevInst);
		}
		break;
	}

	SetupDiDestroyDeviceInfoList(device_info);

	RETURN_OK();
}

SP_PRIV enum sp_return list_ports(struct sp_port ***list)
{
	HKEY key;
	TCHAR *value, *data;
	DWORD max_value_len, max_data_size, max_data_len;
	DWORD value_len, data_size, data_len;
	DWORD type, index = 0;
	LSTATUS result;
	char *name;
	int name_len;
	int ret = SP_OK;

	DEBUG("Opening registry key");
	if ((result = RegOpenKeyEx(HKEY_LOCAL_MACHINE, _T("HARDWARE\\DEVICEMAP\\SERIALCOMM"),
			0, KEY_QUERY_VALUE, &key)) != ERROR_SUCCESS) {
		/* It's possible for this key to not exist if there are no serial ports
		 * at all. In that case we're done. Return a failure for any other error. */
		if (result != ERROR_FILE_NOT_FOUND) {
			SetLastError(result);
			SET_FAIL(ret, "RegOpenKeyEx() failed");
		}
		goto out_done;
	}
	DEBUG("Querying registry key value and data sizes");
	if ((result = RegQueryInfoKey(key, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
				&max_value_len, &max_data_size, NULL, NULL)) != ERROR_SUCCESS) {
		SetLastError(result);
		SET_FAIL(ret, "RegQueryInfoKey() failed");
		goto out_close;
	}
	max_data_len = max_data_size / sizeof(TCHAR);
	if (!(value = malloc((max_value_len + 1) * sizeof(TCHAR)))) {
		SET_ERROR(ret, SP_ERR_MEM, "Registry value malloc failed");
		goto out_close;
	}
	if (!(data = malloc((max_data_len + 1) * sizeof(TCHAR)))) {
		SET_ERROR(ret, SP_ERR_MEM, "Registry data malloc failed");
		goto out_free_value;
	}
	DEBUG("Iterating over values");
	while (
		value_len = max_value_len + 1,
		data_size = max_data_size,
		RegEnumValue(key, index, value, &value_len,
			NULL, &type, (LPBYTE)data, &data_size) == ERROR_SUCCESS)
	{
		if (type == REG_SZ) {
			data_len = data_size / sizeof(TCHAR);
			data[data_len] = '\0';
#ifdef UNICODE
			name_len = WideCharToMultiByte(CP_ACP, 0, data, -1, NULL, 0, NULL, NULL);
#else
			name_len = data_len + 1;
#endif
			if (!(name = malloc(name_len))) {
				SET_ERROR(ret, SP_ERR_MEM, "Registry port name malloc failed");
				goto out;
			}
#ifdef UNICODE
			WideCharToMultiByte(CP_ACP, 0, data, -1, name, name_len, NULL, NULL);
#else
			strcpy(name, data);
#endif
			DEBUG_FMT("Found port %s", name);
			if (!(*list = list_append(*list, name))) {
				SET_ERROR(ret, SP_ERR_MEM, "List append failed");
				free(name);
				goto out;
			}
			free(name);
		}
		index++;
	}
out:
	free(data);
out_free_value:
	free(value);
out_close:
	RegCloseKey(key);
out_done:

	return ret;
}

/*** End of inlined file: windows.c ***/

#else


/*** Start of inlined file: linux.c ***/

/*** Start of inlined file: config.h ***/
/* config.h.in.  Generated from configure.ac by autoheader.  */

/* clock_gettime is available. */
#define HAVE_CLOCK_GETTIME 1

/* Define to 1 if you have the declaration of `BOTHER', and to 0 if you don't.
   */
#define HAVE_DECL_BOTHER 1

/* Define to 1 if you have the <dlfcn.h> header file. */
#define HAVE_DLFCN_H 1

/* flock is available. */
#define HAVE_FLOCK 1

/* Define to 1 if you have the <inttypes.h> header file. */
#define HAVE_INTTYPES_H 1

/* Define to 1 if you have the <memory.h> header file. */
#define HAVE_MEMORY_H 1

/* realpath is available. */
#define HAVE_REALPATH 1

/* Define to 1 if you have the <stdint.h> header file. */
#define HAVE_STDINT_H 1

/* Define to 1 if you have the <stdlib.h> header file. */
#define HAVE_STDLIB_H 1

/* Define to 1 if you have the <strings.h> header file. */
#define HAVE_STRINGS_H 1

/* Define to 1 if you have the <string.h> header file. */
#define HAVE_STRING_H 1

/* Define to 1 if the system has the type `struct serial_struct'. */
#define HAVE_STRUCT_SERIAL_STRUCT 1

/* Define to 1 if the system has the type `struct termios2'. */
#define HAVE_STRUCT_TERMIOS2 1

/* Define to 1 if `c_ispeed' is a member of `struct termios2'. */
#define HAVE_STRUCT_TERMIOS2_C_ISPEED 1

/* Define to 1 if `c_ospeed' is a member of `struct termios2'. */
#define HAVE_STRUCT_TERMIOS2_C_OSPEED 1

/* Define to 1 if `c_ispeed' is a member of `struct termios'. */
/* #undef HAVE_STRUCT_TERMIOS_C_ISPEED */

/* Define to 1 if `c_ospeed' is a member of `struct termios'. */
/* #undef HAVE_STRUCT_TERMIOS_C_OSPEED */

/* sys/file.h is available. */
#define HAVE_SYS_FILE_H 1

/* Define to 1 if you have the <sys/stat.h> header file. */
#define HAVE_SYS_STAT_H 1

/* Define to 1 if you have the <sys/types.h> header file. */
#define HAVE_SYS_TYPES_H 1

/* Define to 1 if you have the <unistd.h> header file. */
#define HAVE_UNISTD_H 1

/* Define to the sub-directory where libtool stores uninstalled libraries. */
#define LT_OBJDIR ".libs/"

/* Enumeration is unsupported. */
/* #undef NO_ENUMERATION */

/* Port metadata is unavailable. */
/* #undef NO_PORT_METADATA */

/* Define to the address where bug reports for this package should be sent. */
#define PACKAGE_BUGREPORT "martin-libserialport@earth.li"

/* Define to the full name of this package. */
#define PACKAGE_NAME "libserialport"

/* Define to the full name and version of this package. */
#define PACKAGE_STRING "libserialport 0.1.2"

/* Define to the one symbol short name of this package. */
#define PACKAGE_TARNAME "libserialport"

/* Define to the home page for this package. */
#define PACKAGE_URL "http://sigrok.org/wiki/Libserialport"

/* Define to the version of this package. */
#define PACKAGE_VERSION "0.1.2"

/* Macro preceding public API functions */
#define SP_API __attribute__((visibility("default")))

/* . */
#define SP_LIB_VERSION_AGE 1

/* . */
#define SP_LIB_VERSION_CURRENT 1

/* . */
#define SP_LIB_VERSION_REVISION 1

/* . */
#define SP_LIB_VERSION_STRING "1:1:1"

/* . */
#define SP_PACKAGE_VERSION_MAJOR 0

/* . */
#define SP_PACKAGE_VERSION_MICRO 2

/* . */
#define SP_PACKAGE_VERSION_MINOR 1

/* . */
#define SP_PACKAGE_VERSION_STRING "0.1.2"

/* Macro preceding private functions */
#define SP_PRIV __attribute__((visibility("hidden")))

/* Define to 1 if you have the ANSI C header files. */
#define STDC_HEADERS 1

/* Enable large inode numbers on Mac OS X 10.5.  */
#ifndef _DARWIN_USE_64_BIT_INODE
# define _DARWIN_USE_64_BIT_INODE 1
#endif

/* Number of bits in a file offset, on hosts where this is settable. */
/* #undef _FILE_OFFSET_BITS */

/* Define for large files, on AIX-style hosts. */
/* #undef _LARGE_FILES */

/* Define to `unsigned int' if <sys/types.h> does not define. */
/* #undef size_t */

#if HAVE_STRUCT_TERMIOS_C_ISPEED && HAVE_STRUCT_TERMIOS_C_OSPEED
# define HAVE_TERMIOS_SPEED 1
#endif
#if HAVE_STRUCT_TERMIOS2_C_ISPEED && HAVE_STRUCT_TERMIOS2_C_OSPEED
# define HAVE_TERMIOS2_SPEED 1
#endif

/*** End of inlined file: config.h ***/

#include "libserialport.h"

/*
 * The 'e' modifier for O_CLOEXEC is glibc >= 2.7 only, hence not
 * portable, so provide an own wrapper for this functionality.
 */
static FILE *fopen_cloexec_rdonly(const char *pathname)
{
	int fd;
	if ((fd = open(pathname, O_RDONLY | O_CLOEXEC)) < 0)
		return NULL;
	return fdopen(fd, "r");
}

SP_PRIV enum sp_return get_port_details(struct sp_port *port)
{
	/*
	 * Description limited to 127 char, anything longer
	 * would not be user friendly anyway.
	 */
	char description[128];
	int bus, address;
	unsigned int vid, pid;
	char manufacturer[128], product[128], serial[128];
	char baddr[32];
	const char dir_name[] = "/sys/class/tty/%s/device/%s%s";
	char sub_dir[32] = "", link_name[PATH_MAX], file_name[PATH_MAX];
	char *ptr, *dev = port->name + 5;
	FILE *file;
	int i, count;
	struct stat statbuf;

	if (strncmp(port->name, "/dev/", 5))
		RETURN_ERROR(SP_ERR_ARG, "Device name not recognized");

	snprintf(link_name, sizeof(link_name), "/sys/class/tty/%s", dev);
	if (lstat(link_name, &statbuf) == -1)
		RETURN_ERROR(SP_ERR_ARG, "Device not found");
	if (!S_ISLNK(statbuf.st_mode))
		snprintf(link_name, sizeof(link_name), "/sys/class/tty/%s/device", dev);
	count = readlink(link_name, file_name, sizeof(file_name));
	if (count <= 0 || count >= (int)(sizeof(file_name) - 1))
		RETURN_ERROR(SP_ERR_ARG, "Device not found");
	file_name[count] = 0;
	if (strstr(file_name, "bluetooth"))
		port->transport = SP_TRANSPORT_BLUETOOTH;
	else if (strstr(file_name, "usb"))
		port->transport = SP_TRANSPORT_USB;

	if (port->transport == SP_TRANSPORT_USB) {
		for (i = 0; i < 5; i++) {
			strcat(sub_dir, "../");

			snprintf(file_name, sizeof(file_name), dir_name, dev, sub_dir, "busnum");
			if (!(file = fopen_cloexec_rdonly(file_name)))
				continue;
			count = fscanf(file, "%d", &bus);
			fclose(file);
			if (count != 1)
				continue;

			snprintf(file_name, sizeof(file_name), dir_name, dev, sub_dir, "devnum");
			if (!(file = fopen_cloexec_rdonly(file_name)))
				continue;
			count = fscanf(file, "%d", &address);
			fclose(file);
			if (count != 1)
				continue;

			snprintf(file_name, sizeof(file_name), dir_name, dev, sub_dir, "idVendor");
			if (!(file = fopen_cloexec_rdonly(file_name)))
				continue;
			count = fscanf(file, "%4x", &vid);
			fclose(file);
			if (count != 1)
				continue;

			snprintf(file_name, sizeof(file_name), dir_name, dev, sub_dir, "idProduct");
			if (!(file = fopen_cloexec_rdonly(file_name)))
				continue;
			count = fscanf(file, "%4x", &pid);
			fclose(file);
			if (count != 1)
				continue;

			port->usb_bus = bus;
			port->usb_address = address;
			port->usb_vid = vid;
			port->usb_pid = pid;

			snprintf(file_name, sizeof(file_name), dir_name, dev, sub_dir, "product");
			if ((file = fopen_cloexec_rdonly(file_name))) {
				if ((ptr = fgets(description, sizeof(description), file))) {
					ptr = description + strlen(description) - 1;
					if (ptr >= description && *ptr == '\n')
						*ptr = 0;
					port->description = strdup(description);
				}
				fclose(file);
			}
			if (!file || !ptr)
				port->description = strdup(dev);

			snprintf(file_name, sizeof(file_name), dir_name, dev, sub_dir, "manufacturer");
			if ((file = fopen_cloexec_rdonly(file_name))) {
				if ((ptr = fgets(manufacturer, sizeof(manufacturer), file))) {
					ptr = manufacturer + strlen(manufacturer) - 1;
					if (ptr >= manufacturer && *ptr == '\n')
						*ptr = 0;
					port->usb_manufacturer = strdup(manufacturer);
				}
				fclose(file);
			}

			snprintf(file_name, sizeof(file_name), dir_name, dev, sub_dir, "product");
			if ((file = fopen_cloexec_rdonly(file_name))) {
				if ((ptr = fgets(product, sizeof(product), file))) {
					ptr = product + strlen(product) - 1;
					if (ptr >= product && *ptr == '\n')
						*ptr = 0;
					port->usb_product = strdup(product);
				}
				fclose(file);
			}

			snprintf(file_name, sizeof(file_name), dir_name, dev, sub_dir, "serial");
			if ((file = fopen_cloexec_rdonly(file_name))) {
				if ((ptr = fgets(serial, sizeof(serial), file))) {
					ptr = serial + strlen(serial) - 1;
					if (ptr >= serial && *ptr == '\n')
						*ptr = 0;
					port->usb_serial = strdup(serial);
				}
				fclose(file);
			}

			/* If present, add serial to description for better identification. */
			if (port->usb_serial && strlen(port->usb_serial)) {
				snprintf(description, sizeof(description),
					"%s - %s", port->description, port->usb_serial);
				if (port->description)
					free(port->description);
				port->description = strdup(description);
			}

			break;
		}
	} else {
		port->description = strdup(dev);

		if (port->transport == SP_TRANSPORT_BLUETOOTH) {
			snprintf(file_name, sizeof(file_name), dir_name, dev, "", "address");
			if ((file = fopen_cloexec_rdonly(file_name))) {
				if ((ptr = fgets(baddr, sizeof(baddr), file))) {
					ptr = baddr + strlen(baddr) - 1;
					if (ptr >= baddr && *ptr == '\n')
						*ptr = 0;
					port->bluetooth_address = strdup(baddr);
				}
				fclose(file);
			}
		}
	}

	RETURN_OK();
}

SP_PRIV enum sp_return list_ports(struct sp_port ***list)
{
	char name[PATH_MAX], target[PATH_MAX];
	struct dirent *entry;
#ifdef HAVE_STRUCT_SERIAL_STRUCT
	struct serial_struct serial_info;
	int ioctl_result;
#endif
	char buf[sizeof(entry->d_name) + 23];
	int len, fd;
	DIR *dir;
	int ret = SP_OK;
	struct stat statbuf;

	DEBUG("Enumerating tty devices");
	if (!(dir = opendir("/sys/class/tty")))
		RETURN_FAIL("Could not open /sys/class/tty");

	DEBUG("Iterating over results");
	while ((entry = readdir(dir))) {
		snprintf(buf, sizeof(buf), "/sys/class/tty/%s", entry->d_name);
		if (lstat(buf, &statbuf) == -1)
			continue;
		if (!S_ISLNK(statbuf.st_mode))
			snprintf(buf, sizeof(buf), "/sys/class/tty/%s/device", entry->d_name);
		len = readlink(buf, target, sizeof(target));
		if (len <= 0 || len >= (int)(sizeof(target) - 1))
			continue;
		target[len] = 0;
		if (strstr(target, "virtual"))
			continue;
		snprintf(name, sizeof(name), "/dev/%s", entry->d_name);
		DEBUG_FMT("Found device %s", name);
		if (strstr(target, "serial8250")) {
			/*
			 * The serial8250 driver has a hardcoded number of ports.
			 * The only way to tell which actually exist on a given system
			 * is to try to open them and make an ioctl call.
			 */
			DEBUG("serial8250 device, attempting to open");
			if ((fd = open(name, O_RDWR | O_NONBLOCK | O_NOCTTY | O_CLOEXEC)) < 0) {
				DEBUG("Open failed, skipping");
				continue;
			}
#ifdef HAVE_STRUCT_SERIAL_STRUCT
			ioctl_result = ioctl(fd, TIOCGSERIAL, &serial_info);
#endif
			close(fd);
#ifdef HAVE_STRUCT_SERIAL_STRUCT
			if (ioctl_result != 0) {
				DEBUG("ioctl failed, skipping");
				continue;
			}
			if (serial_info.type == PORT_UNKNOWN) {
				DEBUG("Port type is unknown, skipping");
				continue;
			}
#endif
		}
		DEBUG_FMT("Found port %s", name);
		*list = list_append(*list, name);
		if (!*list) {
			SET_ERROR(ret, SP_ERR_MEM, "List append failed");
			break;
		}
	}
	closedir(dir);

	return ret;
}

/*** End of inlined file: linux.c ***/

#endif

